The neck ligature used to raise and hold the torso upright by putting the brush handle in a holder and the wrist ligatures used to raise the arms by placing the cord over the same holder places the body in the same position it was described to be in when found and brought upstairs.
The ligatures were used to pose the body upright with arms raised. IMO.
I read this entire thread and I think I understand and can visualize what Blue Bottle 01 was describing here. This positioning could have been achieved in a number of locations in the house, JBR's bed or room, the basement, a kitchen chair.
In my notes to this thread I typed out in all caps autoerotic asphyxiation? after reading page one (long before discussion of JW). In the case of JBR, it would not be "auto" - although has it occurred to anyone that the garotte plus ligatures with those specific knots could have caused JBR to auto-asphyxiate? I mean that the murderer setup the circumstance and threatened JBR that if she moved she would die. The murderer, in their twisted perception, then believed that JBR did cause her own death as Blue Bottle 01 suggests several times that the murderer did believe JBR was somehow participating in the Victory Sacrifice.
Breath Play. Are there not unusual BDSM practices where one party is intentionally brought to near unconsciousness only to be revived again, and then repeat?