Hello,

in the picture you can see, the copper blocks from your mod, but I can't chisel the normal copper block, from Mekanism, into your blocks.
I installed both mods without config changes.

Now the question, am I just stupid or it doesn't work?

MC : 1.12.2
Forge : 2512
Chisel : 0.0.14.18
CTM : 0.2.3.9

EDIT : Same happend with all Thermal blocks into chisel block, JEI show me now recipes.

see changelog from https://minecraft.curseforge.com/projects/chisel/files/2479232

This is already resolved by 9d403d8

:O , cant wait for the next release then :D (no more need for CT workaround lol)