I'm doing the work. On this model boat, yes, the cap has to come off to work on the transom or stringers. If it was only transom work, you could cut only the cap around the transom.
One product, seacast, is a pourable mixture. Not sure what I'm going to do yet. Still haven't ruled out scrapping the boat, selling the engine - trolling motor - and trailer. Or keep the trailer and turn it into a utility trailer. At this point, nothing has been ruled out . The hull is good shape. Nothing more than the normal scratches/ wear from use.