Hi Norman,
I have no experience of the Seal and 21 so can’t really comment. Ditto Winchrite
Raising the keel my 235 is not the easiest of experiences – in fact when it is out of water and the boat yard lift so I can antifoul the keel – it is really hard work.
At this stage I usually slap loads of marine grease on the leading edge of the keel then once in the water, using a brush taped to a stick, yet more. Also, I make sure that the roller is free. This seems to help but who knows!
Wonder if anybody else has a similar problem/solution?
Regards