(Update: Added new perc of a different style. 4 arms that connect to 2 chambers and exit through 6 larger holes per chamber. .4mm center hub is just for a support blocker, it doesn't need supports for the center.)
(UPDATE: Added 8 Arm perc chamber, that is 3" long, 1" shorter than the 4 arm perc chamber.)
(Update: Bong can now be made to an infinite length. Added 7" extension chamber and 4" 4 arm diffused percolator chamber. Print Percolator chamber OD thread side down with support angle at 50 touching build plate only. Use 10 top and bottom layers to insure the parts printed over air seal up nicely. I will add a pic of Perc chamber once it has finished printing.)
(Update: I have now printed this item and everything worked as expected. Happy Printing!)
(I have not printed this yet, but am working on it as this is being typed and will update when finished.) This was made to fit a 18mm male glass on glass bowl. Item prints in 4 pieces, Base, Center, Top, and Slide. Base, Top, and Center are threaded for mating and the slide is an angled socket for mating. Although I have not finished printing to test fitment, I did run it through Solidworks interference detection for all mating surfaces and all looks good. No supports should be required for this print as long as you pay attention to orientation on the print bed. I believe this totals 16" tall once assembled with just base, 1st, and top files. The base must be connected to the file labeled 1st, it has different threads than the rest of the sections. All other sections will work with each other.