When you have both thermal expansion and EE3, then you can make 6 planks out of one wood and gain some sawdust using the sawmill and you can put 4 planks together to make one wood again, so essentially, you're gaining free stuff, I tested the extent of this exploit and came up with the following results, beginning with one full stack of wood and a new minium stone, I eventually got almost 9 stacks of wood and almost 2 stacks of charcoal (which can be made by using the sawdust) and this with only one minium stone, that equals about 2 and a half free diamonds, so you might want to reconsider this particular recipe or make it so, when both EE3 and Thermal Expansion are used, that the recipe is not valid anymore

Pretty sure this is going to be fixed w/ DynEMC. Of course, pahimar will have to confirm, but...

What Wliu said