Hi all, decided to spent a decent amount on a quality bong. This is what I've picked out, and I need some help with one piece I'll explain it: http://www.grasscity.com/int_en/blaze-glass-triple-percolator-ice-bong.html http://www.grasscity.com/int_en/carbon-filter-adaptor-14-5-18-8.html http://www.grasscity.com/int_en/black-leaf-bong-adapter-4-arm.html I've put a decent amount of thought into this so I feel like this will do me well. 18.8mm downstem to allow more air in, the four arms should allow equal if not less drag than the existing one, carbon filter to prevent shit getting in the percs Only problem is that I don't know how long of a downstem to get, as there are three lengths to choose and I obviously would like it to be as long as possible without being too long So, thoughts, issues, etc?