I have an older LT40 ARF from back in the 90's

About 4 yrs ago I decided to make it a Tail dragger with bolt on wings

I removed the covering under the wing for the part that fits over the fuselage.

I made a plywood wedge for the front half of the wing with two 1/4" dowels protruding.

In the front bulkhead, F-2 I drilled to matching 1/4" holes for the two dowels

At the rear, I covered the bottom of the wing with a piece of 1/8" ply with hardwood shims to allow for the dihedral

There's already a plate in the rear that I added 1/4" ply under

I drilled down through the plywood doubler on top of the wing clearance holes for 1/4" wing bolts

The plywood in the fuselage was tapped 1/4-20 for the nylon wing bolts. I put thin CA in the hole and when dry re-tapped the hole

While I was at it I used the rear reinforcement to raise the trailing edge of the wing 1/4" to subdue the tendency of the plane to climb with increased power