Re: Hi, we too got a new/used Cal 21
Rippy, I wish I had advice to offer but I only have experience. We sailed a little last summer with no support on the trunk. We had removed everything (v-berth, quarter berths, trunk support) to rebuild the trunk and get rid of any rotten wood. There was quite a bit of flex in the trunk while sailing especially when there was a little swell. The support gives not only the trunk rigidity but also the hull. It was pretty frightening to watch it while underway but nothing bad happened.