You could totally do that. You could also put a new attachment point at the boom gooseneck and raise the entire boom. The SX mast is about 18 inches taller, so regardless of moving the gooseneck, realize your mainsheet (and downhaul) would effectively be a lot shorter (18 inches x your ratio (7:1, 8:1, etc) shorter. Maybe you have to use the mainsheet as a mainsheet only and rig a separate traveller sheet.
If you do not go boomless, in consideration of your bambinos, maybe put some adhesive deck foam on the boom to at least soften any impact. Had a hiccup out solo one time that resulted in 15 face stitches, ...an ounce of prevention.
If you don't care too much, not racing, don't care about class legality, etc, etc.. then don't sweat the square top or not either, just do what you do man!
Chip is great. Bought my squaretop, jib, etc from him. (see my avatar pic)
Edited by robpatt on Apr 21, 2021 - 03:54 PM.