When I make a tool with a material added by this mod the parts don't render.

Any particular types of tools that seem to be affected?

Seems to be every tool. Here's a reddit thread from someone with a similar problem: https://www.reddit.com/r/feedthebeast/comments/565ory/i_am_wielding_a_third_of_a_diamond_pickaxe/

Thanks for reporting this, I'll have it fixed sometime tomorrow.