diff --git a/docs/src/internals/montecarlo.md b/docs/src/internals/montecarlo.md
index b1f856827..1c5a942b6 100644
--- a/docs/src/internals/montecarlo.md
+++ b/docs/src/internals/montecarlo.md
@@ -316,3 +316,14 @@ generate_trials!(sim, N, filename=joinpath(output_dir, "trialdata.csv"))
 set_models!(sim, m)
 run_sim(sim, output_dir=output_dir)
 ```
+### Simulation Modification Functions
+A small set of unexported functions are available to modify an existing `Simulation`.  The functions include:
+* `deleteRV!`
+* `addRV!`
+* `replaceRV!`
+* `deleteTransform!`
+* `addTransform!`
+* `deleteSave!`
+* `addSave!`
+* `set_payload!`
+* `payload`
diff --git a/docs/src/reference.md b/docs/src/reference.md
index 34d77ff88..9223e1449 100644
--- a/docs/src/reference.md
+++ b/docs/src/reference.md
@@ -26,12 +26,12 @@ is_timestep
 load_comps
 modeldef
 name
-new_comp
 parameters
 parameter_names
 parameter_dimensions
 plot_comp_graph
 replace_comp! 
+replaceRV!
 run_sim
 set_dimension! 
 set_leftover_params! 
diff --git a/docs/src/tutorials/tutorial_4.md b/docs/src/tutorials/tutorial_4.md
index 829131d3c..43368abd5 100644
--- a/docs/src/tutorials/tutorial_4.md
+++ b/docs/src/tutorials/tutorial_4.md
@@ -90,7 +90,7 @@ of all scenario value vectors. In situations in which you want the SA loop to ru
 some of the models, the remainder of the runs can be handled using a `pre_trial_func` or
 `post_trial_func`.
 
-### Step 2. Generate Trials
+### Step 3. Generate Trials
 
 The  [`generate_trials!`](@ref) function generates all trial data, and save all random variable values in a file. Employ this function as follows:
 
@@ -262,3 +262,14 @@ set_models!(mcs, [base, marginal])
 generate_trials!(mcs, N; filename = "ecs_sample.csv")
 run_sim!(mcs; post_trial_func = my_scc_calculation)
 ```
+## Simulation Modification Functions
+A small set of unexported functions are available to modify an existing `Simulation`.  The functions include:
+* `deleteRV!`
+* `addRV!`
+* `replaceRV!`
+* `deleteTransform!`
+* `addTransform!`
+* `deleteSave!`
+* `addSave!`
+* `set_payload!`
+* `payload`
diff --git a/src/Mimi.jl b/src/Mimi.jl
index ab0203da0..30dff449c 100644
--- a/src/Mimi.jl
+++ b/src/Mimi.jl
@@ -35,7 +35,6 @@ export
     load_comps,
     modeldef,
     name,
-    new_comp,
     parameters, 
     parameter_dimensions,
     parameter_names,