Collecting any breakable ore with the Mining Drill's silk touch mode gives experience, even when it shouldn't. This is valid for any block (both vanilla and modded) that doesn't drop itself without a silk touch tool and gives experience. The collected block also drops its secondary outputs, like TechReborn's gems and Extra Utilities's Resonating Redstone Crystal, allowing players to get an endless amount by simply placing again the blocks in the world and recollecting them with the drill.

Another issue is that the Drill's silk touch mode doesn't work on the last point of fuel, breaking the targeted block normally.

Since I'm here, I would like to request, if possible, to make it so both the drill and the hammer automatically "reload" if you're holding the left mouse button when they deplete their fuel.