Share 'Tiki21 Lofting on the15mm sheet'

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…