@SAWBONES - thanks for posting!
A couple of suggestions for the above;
I use this pouch from CountyComm to place my house keys in. Placing it in a front pocket provides "filler" to keep the light riding vertically in a stable fashion. This works well for me.
Using this horizontal kydex carrier is another option worth trying. It's designed for 1-inch body lights so the BD v.2 head fits it perfectly. Wrap the lanyard around the carrier for extra retention security. This one I cut down for a different LEGO, but I'm going to order another because I do very much like horizontal belt carry too;
No doubt it takes some experimentation to find what works best. These two options are IMO worth a try.
Thanks again, very much appreciated!