I bought a used kilt on ebay recently, surplus from a pipe band. It's a 13-oz Buchanan, old but in good shape, and fits waist and hips quite well. The problem is that the pleats are a bit splayed and so don't hang right. They ripple instead of hang straight. Short of a full rebuild, what are my options to improve the hang and get rid of the splay?

(I'm guessing it will involve a lot of basting and pressing, but...)