Try to fix the weird fuel-consumption behaviour of the Smeltery. It should only consume fuel if it needs any now. And also it shoudl not randomly lose lava anymore.
Lava lasts a tad longer. Turns out smelteries are consuming 1.5x as much lava as the old smelteries! It's only 1.25 as much now.
To be exact: 15 mb are used every 4 seconds
Try syncing internal itemstack damage with the damage from the tool
Merge branch 'master' of https://github.com/SlimeKnights/TinkersConstruct