Hi Tómmes,

That's wonderful that he was willing to send you pics. I think I'd stick by my recommendations from my previous post. I think he needs a goodly amount of taper in the apron, and the pleats taper will pull it in to the small of his back enough without giving the pleats "the wave".

You might consider adding 1/2" to the apron at the hips and 1/2" to the pleats at the hips in order to give the kilt a bit more girth in the hips so that the apron hangs straighter down the front and doesn't pull in under his tummy.