Tumbler ranks right up there with the powder trickler for space-occupation/dust collection.
LMAO!
A small spoon and a roll of paper towels have served me just fine for 58 years. I see no need to switch now, and my 58 y/o 30-06 dies somehow still work fine.
I started out using things like STP for sizing and still do sometimes, just to keep my curmudgeon factor at full tilt.