Very common issue that becomes quite the annoyance after a while. I built a modular frame using some leftover PVC pipe from a septic job to fit over the mooring cover. There is a post in the mid section to support the length of the spine. For the winter setup, ratchet straps are fastened to various points on the frame and pulled into the mooring cleats to prevent shifting or separation. Just drape the cover over the frame/motor, tighten up, and there you go! Everything comes apart for easy storage. Perhaps something similar to this design will help with your options.