If it has the same size head you should be ok. If you cut new threads in the wing mounting block, use thin CA, a drop or two and let cure before you put the wood screw back in.

I forgot that a few manufacturers use steel screws to mount the wing instead of nylon bolts. Usually on a trainer the wing is rubber banded down.

How is your tail-weight situation going? The only things I can think of to reduce your weight are, lighter prop, mounting your engine as far back as you can, smaller spinner, or moving your gear toward the back of the plane.