Yeah your R1 ribs go the other way round, but you worked that out, well done.
There should be long slender triangular supports running the length of the leading and trailing edges of the ribs. These will support the ribs at the correct angle and prevent warps in the wing. It's not too late to slide them in now but you will definitely want them there when you start sheeting the wing.
You definitely need to have the wheels very close to the plan position when extended. If they are too far aft the model will be difficult to rotate to takeoff attitude (this model takes off quite nose high), if they are forward of the cg the model will sit on its butt.
I would see how far forward you can slide those retracts before you hit the top wing skin, then you will have to bend the legs forward until the wheels are in the correct position. Should fit with a bit of persuasion.
It's looking good so far
Dave H