Hi Andrew,
The mast is a Marstrom Tornado tapered extrusion, probably 1970s vintage, and measures right at 32'; the finished luff of the sail will be 30'.
Great upgrade for a 18 sq.
This brings up some more questions:
Did you use the nacra or tornado rigging?
Or did you make up a complete new rigging?
Did you change anything on the tornado mast foot / nylon mast ball on beam?
Geert Lindemulder
nacra 18 sq sail # 306