See I havent had any problems with mine breaking or anything since I made it about a year ago.

But my plan has always been a glass on glass stem setup, with a diffuser, but I intend on cutting a slot at the top of the main downstem, so that when you suck in the smoke after pulling out the slide, you dont have to pull the air through the entire downstem and the water, its just a straight suction. Its not a large slot, just a small one, and the slide from the bowl would go past it enough when the bowl is in the downstem to prevent any loss of suction when pulling a hit.

I want to do this because currently mine is a frankenstien, and has a single long metal downstem that you pull entirely out to pull your hit, and I really enjoy not having to pull through the water to get the smoke.