It's interesting reading this thread after just coming from a discussion thread on the design quality and build quality in the RV world.
As "quality" relates to this thread ... many of you have done great things inside your RV's. HOWEVER, why did you have too!!!!!!!!!!! I lot of the stuff done by owners (other than updating to more modern onboard equipment) should have been taken care of at the time of manufacture through quality design and construction - by a manufacturer who knows and cares about how their RV is actually going to be used.
As for me, I've had to improve and rebuild some things on our RV. But I wish that I hadn't had to do it, as I had and have better things to do with my time.