Affected version: GregTech 6.14.09 I suspect this may be a cross-mod interaction between GregTech and iguana_man’s Tweaks for Tinkers’ Construct because there’s a feature in Tweaks for Tinkers’ Construct (which I have enabled) that changes the gravel drop mechanics so it always drops gravel (rather…

Okay I added a GregTech Config for it, that should work better for harvesting Gravel Blocks, than whatever Tweak you used.