I am wondering how a slung pony would interfere with BCD removal and replacement both underwater and on the surface. I am considering buying a 19cf pony and the x-bracket. My reasoning is that with the x-bracket it would be very easy to remove and replace my BCD. I am an instructor and when I am not teaching I often dive solo to 40 m max. I would like to keep the same rig for teaching, including confined water demonstrations, as I use for my solo dives. I also think my students would be less confused and distracted by a tank mounted pony. I also think it will get in the way less from hands on teaching like grasping both the descent line and the D ring of the students BCD during CESA training. Have any of you tried teaching OW courses with a pony in either configuration? Also, has anyone tried using 2 x-brackets, one on each tank band, with a 19cf pony on a Halcyon doulble banded BCD for super secure rig?