I was lucky, on my cr28rd they are easy to get to and easy to carefully pull out. new ones just push right in. next issue for me is to figure out how to keep both my propane doors from popping open while on the road. I have a small aluminum channel across each one and screwed into the frame at each end. without that they bow out and become unfastened. I have even removed the tie down bands and rotated them to where the latch is not in the doorway. thinking of mounting a strip of aluminum angle to latch side of frame so there is more area for the latches to bear on.
2021 cruiser air cr28rd