This is a larger version of my other dice tower here:

http://www.thingiverse.com/thing:1156522

This re-designed larger version is for those of us who like to roll 20+ dice at a time (for whatever reason... gotta admit... it is a little satisfying). It takes up just a bit more real estate than the narrower one, but takes about 3 times as long to print.

No supports necessary, just print out the pieces and assemble.

It only has one kind of module that has baffles in it, but that seems to do the trick for most gamers (vs having the arches and spirals of my other version). The closest distance between the baffle edges in this module is 24mm so if you have dice that are longer than that along their longest axis, they'll get stuck. For everything else, just pour it on in and there's no stopping it's tumbling action!

November 17th, 2015 update: Replaced the Base piece with one that had a taller exit so that even dice that land near the exiting ramp are still readable. Discard the old one and use this nicer, friendlier 2nd version (of the same name: base.stl). Thanks for your feedback!

December 10th, 2015 update: Looks like the Base that I added on Nov 17th had a lousy junction parameter! I've updated it to the correct radius and uploaded the new file. I'm printing it out currently to verify and will upload images soon! Huge thanks to laurent_despeyroux for pointing this out!
Quickie update: The printout today turned out great! Each module comfortably fits into the next. Enjoy!