Howard,
This is how I used to step the mast of my Apollo 16. This method works very well. I wasn't sure how it would work on a beachcat because the mast is much heavier. Has anyone else used the jib halyard? This seems to me to be the easiest and doesn't require any additional equipment, blocks, or lines.
One issue I have with my Nacra 5.2 is that the mast does not have any way for me to capture the bottom (foot) of the mast. There is no place for me to lock it; no pin, no holes or anything. It just sits on the ball. So when I am raising the mast, I have to have someone, who is very brave, hold down the base of the mast until I get it to about 45 degrees. When I am lowering the mast, the very brave person holds it down until I get it to about 30 degrees and then it always pops out. If I have not gotten far enough back, the masthead drops hard. Luckily, I do this on the beach so it lands in the sand. Any ideas short of going out and buying a new base for my mast?

-Rob V.
Panama City
Nacra 5.2