Welcome to the forum. I too have a Jay Feather 165, and while I didn't have the same problems you did, there were a few glitches with mine:
1. Only one out of the 4 power outlets in the trailer worked, which made things quite inconvenient.
2. Apparently, one of the water hose/pipe fittings came loose, causing some water to pool up underneath the sink.
3. I couldn't get the collar on dumping hose, so I had to postpone using the black tank until this got fixed.
4. The screws on a steel bracket underneath the trailer (which holds some kind of junction box) snapped, so I had to use wire to hold it in place until going in for service.
Since those items have been fixed, things have worked well and I have no complaints. Also, the rig seems solid and it's well put together.
Hope things get better from here on out.