So much time searching

I really didn't think it was going to be such an ordeal. Remember in my previous post I decided to change the air vents for the grey and black tanks and run them separately to the roof vent? Two days, four trips to Home Depot, and one trip to Andrew Sheret (plumbing supply store) later... Trying to connect systems in plumbing can be very challenging. You go to the store to be confronted by entire walls of choices that "mostly" fit together one way or another. The "funny" thing is that I spent hours working through a series of parts one step at a time. They had 1/2" flush bushings to go on the end of the pipe I had. They had 3/4" flush bushings. They had 1/2" threaded male straight to PEX. They had 3/4" threaded male straight to PEX. They had 1/2" threaded male 90° to PEX. But of course the ONE thing I needed - 3/4" threaded male 90° to PEX does not exist. The fellow at HD figured that Andrew Sheret would have it so off I drove. The counter person there said, no, actually never seen that before. Even online such a beast didn't exist. The funny thing is that when I was at HD today, another fellow was looking to connect something for his pool pump system at home and was perplexed. We looked at each other and laughed about the sea of too many choices but none really working. When I asked him what he was trying to do, I took him to the flush bushings... He was happy and got confirmation from his "pool guy" that that should work. Then he laughed and said he was sorry that he couldn't help solve my problem. Well, in the end I modified something to our unique situation with the ceiling, bathroom wall, and vents. I'll post pictures tomorrow but my test fit today seemed like everything should work better than my previous plan. The solution to my problem: just a little work with a drill press, hole saw bit, round file, table saw, ABS-PVC transition glue, PVC cement, rubber sealant,... LOL! It has turned out great though - zero clearance so no bump out needed now and the two tank vents don't merge until just a few inches from the ceiling vent exit. It took two days and some "modding" but a better end result. Yay!