UPDATE: I am on the fourth full day (12+ hours/day) of carrying my Glock in the UBG Canute at 4:00. However, after about the second full day, it kind of made its way back around to three o'clock. Sometimes it seems to 'seek" its most comfortable position. The original issue with the back of the slide poking though my shirt is beginning to seem like more of a perceived issue of mine that an actual issue. I will keep you posted.