I used the 6mm blindnuts that were supplied in the wing in front of the spar. I welded 5mm allen wrench long end into the 6mm socket head screw and cut off the the short end. I use a 5mm socket-universal joint-6" extention and a 1/4 drive ratchet to tighten the winbolts.

Once blind nut is in place to transfere hole location...

I used a 6mm by 25 mm socket set screw grind or beltsand a point on the "cup" of the screw. by hand serw it into the wing so the point sticks out 1/8 -1/4 ". With the spar in place put the wing on the two pins should enter the fuse before the pointed setscrew marks the fuse for the wing bolt clearance hole. Also do this to your fin panel the wig bolt has to pass thru here too.

newer Roo's have and added plywood plate to strenthen the landing gear mount you will have to drill throuh this too. from the gear opening you will have to drill the inner bolt hole larger to clear the head of the wing bolt and nylon spaccers listed below.

local hardware store visit nets you:
2- 1/4" fender wahshers
2- 1/4" ID grommets
4- 1/4 ID x 3/8 - 1/2 OD x 1" long nylon spacers

now make a 1 1/ x 1 1/4 x 1/8" ply wood plate
drill a hole on center to mount the grommet in & install grommet
(this plate will capture wing bolt )

ok the fun/frustration begins start with fuse up on is side

1) get the fenderwasher inside the fuse center over the wing bolt hole
2) install wingbolt thru the inner hole then the washt and the clearance hole in the fuse.
3) place 2 on the spacers on the 5mm hexshaft ( from the allan wrench)
4) put fin and wing panels on the jet and draw them up snug using the socket wrech setup.
5) locate plate with grommet test fit over 5mm hex shaft flush to inner gear support plate, then glue in place

the plate with grommet will keep your wing bolt assembly in place and aligned.