Step 5 : Glueing the two halves (at the spine)
1. Line the right halve (front side) with the outside border of the plan and fix the sail with paper tape.
2. Glue the left halve onto the right halve, using the printed seam from the plan.
Watch Out: Because the spine side isn't straight we glue the part from nose to the Central-T first. The bottom part (from Central-T to tail) we'll glue when the top-part glue is dry and hard.
3. Leave the sail front side up on the plan for the next step.