You don't have to use a back plate for your control horn on the Escapade. There is a hardwood block set in the ailerons for wood screws to screw into. The only time you need to use a backplate is if the wood is balsa, which is too soft to handle the stresses.

One thing of note on the single servo aileron. you will have to relocate the battery from where the manual calls for it to go. If using a single servo the battery in the shown location will keep the wing from being mounted. It's not a big deal to move the battery though, just thought I would point it out now.

Ken