I think it looks great. We can nit-pick the finer details (hey, it's what makes these conversations interesting), but have no doubt that you will be representing the kilt very well.

The only nit-picking I can really do is to agree that the top-of-the-knee height would be better for the kilt, and the bonnet (worn only out-of-doors, of course) would look better worn with the crown over to the right instead of centered like a flat-cap. Oh, and a nice pocket square might be a nice touch too!