Yeah rimless are better, you can get the official rim screen from TM so it won't get stuck, but I don't like using it as much... Also the trick to loading, do so upside down, I mean I like to keep it all upside down using a U-turn setup anyway, but yeah this keeps things cleaner, especially if you keep it upside down until you start taking your first hit, once you start inhaling with heat, the load will completely stay in the basket pretty much... However the standard design when you are loading and using carefully, even turning upright etc there is really no problem, and you have the protective screens there for a reason (you wouldn't want like fine powder I suppose though and there is always a risk potentially over time for dust particle etc just to fall through anyway)