I recently bought a 1980 C25. How do I determine whether the boat has a tall rig or a standard rig? I've searched for specs, and found just about everything except for mast length. Could someone point me to this information?Also, I found conflicting info on mast height above the waterline; one place listed 33', the other 36-something. I don't think there is a 3-foot mast length difference between standard and tall rig, is there?Thanks,Jack