I agree with Matt, tell the kiltmaker to make the kilt so it fits correctly at the center hole, My traditional was made to allow the kilt to fit correctly at the last hole in the strap adjacent to the kilt fabric. I lost a few more pounds and had some difficulties with the original size. I may need to have the waist of my kilt taken in a couple of inches.

When the kilt was ordered, I thought the correct size would fall at center strap. (my assumption) I was wrong, it's a good idea to talk to the kiltmaker about the size before finalizing your order.