Great instructions. I had to do this to my kilt a few weeks ago, and I'm glad I did it correctly!

I did have a difficult time deciding how far to move the buckles and straps. I ended up measuring the kilt laying flat and doubling the measurement and subtracting my current waist measurement, which seems the obvious choice, but I landed on the strap fitting on the tightest hole. If I did it again (which I hope I'll have to) I'd get someone to help me mark the location of the middle hole as I wrapped the kilt around myself tightly.