diff --git a/include/stc/csview.h b/include/stc/csview.h
index bec4d82b..e5168b70 100644
--- a/include/stc/csview.h
+++ b/include/stc/csview.h
@@ -150,25 +150,6 @@ STC_INLINE bool csview_eq(const csview* x, const csview* y)
 
 #endif // STC_CSVIEW_H_INCLUDED
 
-/* csview interaction with cstr: */
-#ifdef STC_CSTR_H_INCLUDED
-
-STC_INLINE csview cstr_substr(const cstr* self, intptr_t pos, intptr_t n)
-    { return csview_substr(cstr_sv(self), pos, n); }
-
-STC_INLINE csview cstr_slice(const cstr* self, intptr_t p1, intptr_t p2)
-    { return csview_slice(cstr_sv(self), p1, p2); }
-
-STC_INLINE csview cstr_substr_ex(const cstr* self, intptr_t pos, intptr_t n)
-    { return csview_substr_ex(cstr_sv(self), pos, n); }
-
-STC_INLINE csview cstr_slice_ex(const cstr* self, intptr_t p1, intptr_t p2)
-    { return csview_slice_ex(cstr_sv(self), p1, p2); }
-
-STC_INLINE csview cstr_u8_substr(const cstr* self , intptr_t bytepos, intptr_t u8len)
-    { return csview_u8_substr(cstr_sv(self), bytepos, u8len); }
-#endif
-
 /* -------------------------- IMPLEMENTATION ------------------------- */
 #if defined i_implement || defined i_static
 #ifndef STC_CSVIEW_C_INCLUDED
diff --git a/include/stc/priv/template.h b/include/stc/priv/template.h
index 97cf42e1..741c6937 100644
--- a/include/stc/priv/template.h
+++ b/include/stc/priv/template.h
@@ -32,7 +32,8 @@
   #define c_no_emplace    (1<<3)
   #define c_no_hash       (1<<4)
   #define c_use_cmp       (1<<5)
-  #define c_more          (1<<6)
+  #define c_use_eq        (1<<6)
+  #define c_more          (1<<7)
 
   #define _c_MEMB(name) c_JOIN(i_type, name)
   #define _c_DEFTYPES(macro, SELF, ...) c_EXPAND(macro(SELF, __VA_ARGS__))
@@ -116,6 +117,9 @@
 #if c_option(c_use_cmp)
   #define i_use_cmp
 #endif
+#if c_option(c_use_eq)
+  #define i_use_eq
+#endif
 #if c_option(c_no_clone) || defined _i_carc
   #define i_no_clone
 #endif
@@ -123,6 +127,8 @@
   #define i_more
 #endif
 
+// Handle predefined element-types with lookup convertion types:
+// cstr(const char*), cstr(csview), arc_T(T) / box_T(T)
 #if defined i_key_str
   #define i_key_class cstr
   #define i_raw_class ccharptr
@@ -144,12 +150,15 @@
   #define i_raw_class c_JOIN(i_key_arcbox, _raw)
 #endif
 
+// Check for i_key_class and i_raw_class, and fill in missing defs:
+// Element "class" type with possible assoc. convertion type and "member" functions.
 #if defined i_raw_class
   #define i_keyraw i_raw_class
 #elif defined i_key_class && !defined i_keyraw
   #define i_raw_class i_key
 #endif
 
+// Bind to i_key "class members": _clone, _drop, _from and _toraw (when conditions are met).
 #if defined i_key_class
   #define i_key i_key_class
   #ifndef i_keyclone
@@ -166,18 +175,20 @@
   #endif
 #endif
 
-#if defined i_use_cmp || defined i_cmp || defined i_less || defined _i_sorted || defined _i_ispque
+// Define when container has support for sorting (cmp) and linear search (eq)
+#if defined i_use_cmp || defined i_cmp || defined i_less
   #define _i_has_cmp
 #endif
-#if defined i_use_cmp || defined i_cmp || defined i_eq || defined i_hash || defined _i_ishash
+#if defined i_use_cmp || defined i_cmp || defined i_use_eq || defined i_eq
   #define _i_has_eq
 #endif
 
+// Bind to i_keyraw "class members": _cmp, _eq and _hash (when conditions are met).
 #if defined i_raw_class
-  #if !defined i_cmp && defined _i_has_cmp
+  #if !(defined i_cmp || defined i_less) && (defined i_use_cmp || defined _i_sorted || defined _i_ispque)
     #define i_cmp c_JOIN(i_keyraw, _cmp)
   #endif
-  #if !(defined i_eq || defined i_cmp) && defined _i_has_eq
+  #if !defined i_eq && (defined i_use_eq || defined i_hash || defined _i_ishash)
     #define i_eq c_JOIN(i_keyraw, _eq)
   #endif
   #if !(defined i_hash || defined i_no_hash)
@@ -194,21 +205,21 @@
 #elif defined i_from || defined i_drop
   #error "i_from / i_drop not supported. Define i_keyfrom/i_valfrom and/or i_keydrop/i_valdrop instead"
 #elif defined i_keyraw && defined _i_ishash && !(defined i_hash && (defined _i_has_cmp || defined i_eq))
-  #error "For hmap/hset, both i_hash and i_eq (or i_less or i_cmp) must be defined when i_keyraw is defined."
+  #error "For hmap/hset, both i_hash and i_eq (or i_cmp) must be defined when i_keyraw is defined."
 #elif defined i_keyraw && defined i_use_cmp && !defined _i_has_cmp
   #error "For smap/sset/pque, i_cmp or i_less must be defined when i_keyraw is defined."
 #endif
 
-// i_eq, i_less, i_cmp
+// Fill in missing i_eq, i_less, i_cmp functions with defaults.
 #if !defined i_eq && defined i_cmp
   #define i_eq(x, y) (i_cmp(x, y)) == 0
 #elif !defined i_eq && !defined i_keyraw
-  #define i_eq(x, y) *x == *y // for integral types, else define i_eq or i_cmp yourself
+  #define i_eq(x, y) *x == *y // works for integral types
 #endif
 #if !defined i_less && defined i_cmp
   #define i_less(x, y) (i_cmp(x, y)) < 0
 #elif !defined i_less && !defined i_keyraw
-  #define i_less(x, y) *x < *y // for integral types, else define i_less or i_cmp yourself
+  #define i_less(x, y) *x < *y // works for integral types
 #endif
 #if !defined i_cmp && defined i_less
   #define i_cmp(x, y) (i_less(y, x)) - (i_less(x, y))
diff --git a/include/stc/priv/template2.h b/include/stc/priv/template2.h
index aba22107..00a64129 100644
--- a/include/stc/priv/template2.h
+++ b/include/stc/priv/template2.h
@@ -58,6 +58,7 @@
 #undef i_keydrop
 
 #undef i_use_cmp
+#undef i_use_eq
 #undef i_no_hash
 #undef i_no_clone
 #undef i_no_emplace
diff --git a/misc/examples/strings/sso_substr.c b/misc/examples/strings/sso_substr.c
index a419dac5..f25dd375 100644
--- a/misc/examples/strings/sso_substr.c
+++ b/misc/examples/strings/sso_substr.c
@@ -6,16 +6,18 @@
 int main(void)
 {
     cstr str = cstr_from("We think in generalities, but we live in details.");
-    csview sv1 = cstr_substr_ex(&str, 3, 5);               // "think"
-    intptr_t pos = cstr_find(&str, "live");                 // position of "live"
-    csview sv2 = cstr_substr_ex(&str, pos, 4);             // "live"
-    csview sv3 = cstr_slice_ex(&str, -8, -1);              // "details"
+    csview sv = cstr_sv(&str);
+    csview sv1 = csview_substr_ex(sv, 3, 5);               // "think"
+    intptr_t pos = csview_find(sv, "live");                // position of "live"
+    csview sv2 = csview_substr_ex(sv, pos, 4);             // "live"
+    csview sv3 = csview_slice_ex(sv, -8, -1);              // "details"
     printf("%.*s, %.*s, %.*s\n", c_SV(sv1), c_SV(sv2), c_SV(sv3));
 
     cstr_assign(&str, "apples are green or red");
-    cstr s2 = cstr_from_sv(cstr_substr_ex(&str, -3, 3));    // "red"
-    cstr s3 = cstr_from_sv(cstr_substr_ex(&str, 0, 6));     // "apples"
+    sv = cstr_sv(&str);
+    cstr s2 = cstr_from_sv(csview_substr_ex(sv, -3, 3));    // "red"
+    cstr s3 = cstr_from_sv(csview_substr_ex(sv, 0, 6));     // "apples"
     printf("%s %s: %d, %d\n", cstr_str(&s2), cstr_str(&s3), 
                               cstr_is_long(&str), cstr_is_long(&s2));
-    c_drop (cstr, &str, &s2, &s3);
+    c_drop(cstr, &str, &s2, &s3);
 }