the slits ont eh cartridge i found got clogged no matter what. I actually took a knife and cut out every other ring on the things to let more flow through. Worked for me. But then I modded one half to run biopellets with out the cartridge. works great.
Sorry for hijacking but what's the most amount of pellets you can put in a tlf150 and still have a good tumble? Everything I found was saying 300ml but don't you have 500 pat?