Removing the Stone Hammer from the config, causes the game to crash:
Crashlog: https://paste.dimdev.org/opunepesul.mccrash
CustomTools: https://paste.dimdev.org/enicuyoles.json

Copying my comment from the other issue:

Ah yeah the recipe for the Size Upgrade needs Stone Hammers, so since you removed that hammer, the recipe errors. As a work around for now, you either need to add the Stone Hammer back in or remove the Powered Hammer.

Fixed in commit 5f324b0