I bought one of the used Retro Red UKs. It arrived today, so I put it on and immediately went for a walk (with this thread in mind). I had no comfort problem with the inner apron (or the kilt as a whole). I could feel the apron edge hitting the front of my left leg, but would not even have been aware of it if I hadn't been alerted by this thread! BTW, I guess it's an older style "Original" with only 3 snaps on each apron side....