Hi Mike/Steve
I think top wings on these bipes (F3A ones) need 2 mount screws (points) set as far apart as possible to set and maintain wing alignment, triangulation etc .
I don't think that this mod does that at all well enough. It is a small improvement on a very questionable mounting arrangement. If the wing pivots (tips to and fro) this movement will transition into twisting at the struts causing the tips to twist out of true.
The centre mounting should also set and hold the incidence at the root.
This mod will help with incidence setting but won't do a lot to stop tip 'to and fro' pivoting.

If this mod is only to change the wing incidence it has to ask questions about the quality of the testing.- the kits have hardly landed.

Don't mean to be too harsh but this needs more attention than this mod - frankly a new molding that has a seat to suit the section and two well spaced mount points is the way to go.

Brian