I went to visit my 1990 C34, which has been on its cradle for about a month, and discovered something concerning. The sliding cover didn't slide smoothly. On closer inspection, the cover was touching the deck above it midway port to starboard. So either the curve of the cover increased, or the curve of the deck became flatter. I'm guessing it's the latter. I know the function of the side supports is to maintain side to side balance and not to support weight, but is it possible they were left so loose that the hull sagged? This is the only explanation I can come up with and I want to correct the situation ASAP. Thanks all for your advice.