Jerry,
How many straps and buckles are on the side.From the photo's i can see only one. If you do wish to lengthen the kilt then adding a waist band seems to be your only option. In that case you could also add another buckle and strap which will keep it all in proportion. If you wore it out in public then a belt and buckle would hide the addition. Though with unikilts i doubt any one would know.Others have said to let it find its own level.Good luck on finding a solution. :grin: