I might pick up a damaged Cal 21 and it will definitely need a mast. I have searched far and wide and not found an actual, original length dimension. Fella over in DE has a 22'-8"er with rigging and sails for sale..prolly for a C-20??
Iffa mast and hardware is going to be exhorbitant, the (free) price is moot!
If I can figger a way ta get it out of there and home, I might just take it regardless. I see mast/s and sail/rigging on CL often and could probably rig a similar (length boat's) mast sail plan easily enough.
It would be sweet to have the actual height/length as a starting point if I can;t find an original for the right price