Hello Russyh
Personally I would not even contemplate using a mast from another class if you want to race and stay within class rules.
You would need to check any mast against the rules (
www.sailing.org/1820.php?PHPSESS
... c160d3bc92
)before you consider parting with any money. There may be fittings in the wrong place and moving them will weaken the mast.
My advice would be either to pay up for a new one piece mast or continue with the gaff rig. The gain in performance will be minimal and a couple of bad tacks or poor spinnaker launch will wipe out the advantage. The downside to the one piece mast is that if you capsize it is more likely to turn turtle.
Hope this helps.
Roger Clark
59275