My horse has started to get pretty bad about cutting corners and bulging on the rail. He seems to do it most towards the end of a ride - when he's trying to tell me he's done. I've been using inside leg, outside rein and sitting more balanced - but not completely working. I checked out the videos on your site and seems like the thing to try next might be reverse psychology. When he wants to turn in or cut corners - work him in circles to the inside. I've done a bit of that - but not consistently so will keep at it. Let me know if you have any other tips or tricks!! Thanks so much!!