They work fine
I have independent reservoirs on my RV-8. They have worked perfectly for over 1200 hours. I remove the front baggage compartment floor to check or add to the fluid levels. It is a little bit inconvenient, but doesn't need to be done very often. I use hex-head 832 machine screws to hold down both front and rear baggage compartment floors. They can be installed/removed easily with a small socket attached to a flex drive and an electric screwdriver.
Dan Miller
RV-8, IO-360M1, WW 200RV prop