Here's the reality with adjustments. Once you get it adjusted to your liking, you probably will never adjust it again. I can't see where there would be any more adjustments than on the standard model. Like the thin little strips of adjustable webbing from the back pad down to the bosun seat, once those are set to where your bum seats nicely onto the board, they are adjusted.
One of the best mods I've done to my saddle (same as yours, pretty nearly) is I stitched wide seatbelt webbing to replace the stock bikini straps. You do this by hand with a sewing awl. You can tell by the wear in the saddle that this saddle has seen some hard days, especially in this back area.
With the bosun board you can comfortably (and safely) straddle a limb as you would a horse and even slide backwards down a rough-barked limb and no wear to you derie'r or other important parts.