i purchased those same projectors. i got them as a place holder as a sort of proof of concept and I had intended to upgrade if I liked how things came together and wired up. Turns out, I think the projectors and lights work great, I'm going to stick with them. I'm not sure why the expensive projectors would be better for me, unless the solenoid broke or projector housing, but will see how that goes. Sounds like purists get all excited about a sharp 'cut off line'. Mine seems just fine, and I don't know why that's important. I'm not entering any lighting contests.
When I assembled, I made sure that the projector threads came through perfectly centered in back of housing. I pushed pretty hard on projector to mash the silicone washer while tightening rear nut as much as possible so the projector would not sag. Maybe that's what's happening? I also snaked a ring of butylene around rear of projector along with silicone washer to act as a sort of glue and sealant.
Worked great, only needed a small adjustment. I think your equipment is prob fine, maybe try plenty of pressure on silicone washer when tightening.
I like the paint on your shrouds btw.