I have a 32 foot long Tornado carbon mast on my Nacra 18 square, it is very light and easy to rig, stiff enough to hold the square top sail up and I'm very happy with it. The down side of finding another mast is the rigging points may be in a different place and you can't just pop rivet new attachments for the hounds, the fitting will probably be something that is manufactured to slide inside the mast and be resined in place. I just got different stays to suit the mast made, good luck with your project