[wingnut60]

When tired of dealing with cheap RV stuff, just go to a Lowes/HD and get some regular house fixtures--I have found them to fit just as the factory stuff does. I didn't think it was possible to get stuff that was lower quality than what you find on the racks at the hardware stores, but even that is an improvement over what goes into RVs.
And, also check that all the traps under sinks are tight and lined up.....not fun finding out the trap has fallen off and you are draining right onto the floor.
Joe