Quote Originally Posted by Kid Cossack View Post
Well, since you asked, I prefer two straps. Actually, I also prefer that the left hip strap be set up like Matt Newsome does his---with the buckle INSIDE and no hole cut through the material. YMMV.
For traditional kilts, the belt hole is not cut in the material, but is actually between two pleats. The pleats are just not sewn by the belt hole.

Quote Originally Posted by JimB View Post
As I understand it, the deep pleat helps in movement (and maybe even in modesty when you sit) but what the point of having it, if you're going to restrict its movement with a belt?
The deep pleat is traditionally sewn from the fell to the top of the kilt. Therefore, haveing the extra belt and buckle do not add or subtract from the functionality of the deep pleat.

The engineer in me says that the only thing the extra buckle does is reduce the amount the front apron can move relative to the under apron. With a one belt kilt the front apron will pivot around the waist belt. With two belts, the front apron will pivot around the hip belt. So the cosined of the angle will be less for the two belt kilt (amount of travel at the selvage).