So I am a little confused about my thrusters from my MOW pack. How am I to attach the 3/4" elbow ? Do I shave it down to compression fit in far enough to fit in the pack? It compression fits on the tip but that's it. Or is there something I'm missing here in my thinking. Seems like it's gonna be a pain in the add shaving it in a circle but ok if that's what I need to do.