I've been wearing a Sport Kilt with slash pockets recently and really enjoy it. I've read that Freedom Kilts also offer slash pockets on their traditional kilts, and would love to see how they're constructed.
Follow up question, if you have a Freedom Kilt with pockets: are you happy with them?
I've heard that some kilt makers shy from using pockets because they may effect the swing and drape of the kilt.