I know JRB put out a ton of SRT content over the past six months, including the videos about his floating anchor, which is a single rappel ring (or similar) on the front of the tree (facing the climber).
@John RB have you experimented with the concept that this CGM system uses - two rings, one on each side of the tree? Seems like it would help a lot with getting that horizontal rope angle around the tree that you always stress as critical for safety if we're going to girth hitch the trunk, while providing some advantages over the single front floating anchor such as less friction when rigging the rope, ability to use a quicklink or rappel ring instead of needing the maverick hitch, and less weight directly on the rings.
Interested in your thoughts as I know you've put a lot of thinking into crotch-less presets, if you'd be willing to share.