Step 8: Add the control surfaces
using a jig make all the control surfaces to arc at 9 inch radius.
The side block will use a 4 inch piece of slat and the corners will use a 5 inch piece.
All arcs are to be braced with a 1.5 inch piece of pine slat.
The rough glued control surfaces look like a T
Sand, shape and glue to the blocks as shown. Sanding is best accomplished on a belt sander.
The corners require 3 parts and the sides need 2. mark the center on the block and the T section.
Mark the blocks as shown with a standoff and precision marking implement.