I can no longer remove the end cap on the cylinder, nor take the cylinder off the wired endcap. I’m a little worried about trying to apply too much force, but wondering if this is a common problem. When I first ran the ROV I had trouble keeping the one end cap on, and now have the opposite problem.

The real reason I want to do it is so that I can rotate the cylinder. I have an unfortunate scuff right dead center to the camera.