That information on the website is a bit old now. It was written around 2001 when some experiments were being conducted. A lot of work was put into it but the issue is dead now and there are no plans to make any changes to the Mosquito sailplan now.
We're real happy with it the way it is!
Like I said before, if you are keen to experiment the F16 is the class for you, and they too can be home built in plywood.
Thanks for the tip-off anyway - I should bring that page up to date.
I'm not sure what you're asking re the kevlar. Kevlar, foam & carbon have been used to build Mozzies since the 80's - it's not what you'd call a new development.
Cheers