I know that mod integration is something that ComputerCraft normally steers clear of, but JEI is sufficiently ubiquitous that this is probably worth it.
JEI compares items simply by item name and damage value, ignoring NBT. This means many recipes do not function correctly. For instance, viewing the recipe of a Melee Turtle will display all upgrade recipes. This PR fixes this:
Note that this doesn't add anything "fancy", such as recipe handlers for turtle and pocket upgrades. This might be worth considering in the future.