What you have done is tie the supports for the retracts to the spars but there is no structure, besides the wing skin, between the blocks at the front & the back. Any twisting motion by the retract will be carried by the wing skin.

Whilst the wing is open I'd suggest some extra good quality 1/8 ply ribs from the front to rear spars glued to the existing ribs to bridge the gap. Of course the inboard rib will need a slot for the leg & cylinder. With the rigid legs the retract mounts will take a real pounding. - John.