Just to let you all know the glass is still destroyed by wither projectiles

Wither projectiles... Uhhh... I actually didn't test that... Added to my TODO list for today :P

Okay, I could not confirm this before but after watching Dire's video today it seems like in hard difficulty wither heads override the block breaking protection we're using (No, he didn't use reinforced sapphire glass, but Tema was around and mentioned it) :P

Cool I'm glad the problem was mentioned do you know how to fix it?

I do not! But I'll check EnderIO's source to see how they did their reinforced obsidian block :P