Hmmmmmm
Glue or screws????
I am close to the point of attaching the vertical fins. The instructions say to epoxy them to the airframe.
My concern is that the elevon linkage runs thru the inside of the fins. If I epoxy them on then there is zero access to inspect or service the linkages. The other option is to drill holes thru the wing to epoxy in some hardwood dowels that can be drilled for some screws that will go into the bottom of the fins. I am not sure just how I would get a strong thread into the fin for this attachment. But I do really like the option of access to the control linkages.
The bottom of the fin is 3/8 to 1/2 thick balsa, sanded to match the airfoil of the wing.
For the front screw it will be fairly easy to add some structure and a ply plate with a metal T nut to the inside of the fin. for a rear screw the pushrod runs straight across the balsa fin bottom that is carved out for clearance, a centered screw would hit the pushrod and not really any room to add structure.
Any other ideas?