I have been a little too busy with the havoc in the F16 forum to reply properly to your message.
Are you bulding the mast of 4mm ply coated with glass? Do you have any idea about finished weight compared to an alu tube? Why did you choose to strip with ply when you could have bent the ply over a mould and glassed it to shape? Just curious and trying to learn.

I really love your attitude, with the wine and everything. You even have a female co-builder!