ive got a 21ft mariner cc 1977 i think, want talk with other owners about rebuilds, trailering and other problems.ive rebuilt the cc, real nice and the flooring almost the trailer that came with it probably isnt the right fit so im in the process of putting to of the same together to make it longer with 2 axles my biggest trouble is the sides of the boat seem really flimsy theres not much to the design to give much support, ive replaced rivets in the deck after rebuiling it and am figuring out more options for support, i trailer this boat and run it in most weather on lake erie it bounces around like a beer can in rough water unless i get on it and then it beats its self and me up , but all in all its a pretty tough boat and i got a lot of use out of it the past five years ive had it if i get the trailer flooring live wells and t-top put together and a paint job shell be it. lets chat