A better marble (threaded w no supports)

standard marble size - just less than 16mm.

no supports should be needed

Why did I use a threaded piece to hold the marble together instead of a snap fit or block like the other offerings? because it allows looser tolerances, with less chance of your printer making the connector under or oversized, it will draw the two parts together and you don't have to bash the pieces together. If your threaded connector is properly designed (I hope mine is!) it should print fairly easily assuming good bed adhesion for the low contact area.

adaptive layer heights. Happyfunball was printed with a .2mm nozzle and high detail, along with crazy long purges... probably not worth it unless you have a multiextuder!