I believe I may have the same type of heavily embroidered clan crest on a heavy felt background with three pin-post clasp attachements on the back. I bought mine more to wear at times when I could not wear my tartan, on a blazer, etc...

Some here will tell you that if you are wearing your family tartan, adding additional clan crest items (other than a cap badge) can turn into overkill, as the family tartan is supposted to speak for itself. If one wears a clan crest kilt pin, cap badge, fly plaid broach, belt buckle, and sporran, then adds the blazer patch as above you could see how this could easily get out of hand.

That said I have worn mine as a sort of kilt pin but worn higher on the right front apron edge, about halfway up, below where the kilt has to flex for my hip movement, but above the standard kilt pin location. Too high and the pins can dig into your hip joint when you sit down, too low and it really is a bit bulky and becomes less visible. But I will only wear mine with my family hunting tartan, as it is much less recognizable (outside the clan) than our standard tartan, and the two look entirely different in sett as well as coloration.

Good luck with your atemtps---let us know in pics how it turns out.

jeff