Last year (my first w/ 255 Radiant) we left the starboard panel off, but that was kind of loud. This year so far, I painted the shaft coupler white and added two red nail polish marks 180° apart for the closed prop. Since it is dark down there, I velcroed one of those push to turn on battery operated LEDs on the overhead. My next step is to cut a 10x12" hole in the panel and hinge and latch a piece of existing finished plywood which is heaper than an access port. Foam inslolation tape should add to the sound deadening.