Tiki 21. Parts layout on the 15mm plywood sheet.

[Éric Bouvéron]

Bonjour,
I started to loft yesterday, making templates for the 15mm sheet of the Tiki21.
I take careful mesurements, then tried to put everything on the 1200 x 2400 plywood sheet. Impossible. I cannot put everything. I finished with no space for one rudder.
Mesured again, and agin. Same results, can't find any mistake on my side.
So, question is: did some of you faced the same problem? I will if necessary find a piece of plywood for the remaining part, but I'd like to know if tou got the same trouble.
Thanks,
Éric