As I mentioned before the number of turns required to remove the collection cup was somewhat annoying at times. It did not required a lot of height to be removed but I'll try another mod this time by shaving down the threads. This was done once again on the router table with the bearing removed from the flush trim bit. You can also use a straight bit but I was too lazy to swap it out.
I placed the piece against the fence of the router table (turn on the router first!!), and made light cuts rotating the piece each time adjusting the fence.
Setting the fence for the initial cut
Finished piece. I had to keep checking the threads on the cleanout to ensure that I didn't take too much off. When I was done there was less than a 1/4 turn in order to connect the two pieces, and get a tight fit with the gasket....forgot to mention that the plugs also come with a gasket.
This completes one half of the union/flange that will be attached to the top of the skimmer body.