Because I am not always diligent about emptying the hopper on my Hornady L&L AP, Titegroup turned the plastic hopper tube into a lava lamp. I have some polycarbonate tubing, but it is a bit undersized. I was thinking of making a sleeve on the 3D printer. Although it won't be in direct contact since it will be between the hopper base and the tube, I am concerned that even the outgassing from a double base powder might cause an issue. Anyone here have experience with what TG does to PLA?