I recorded this for reference, because I wanted to work on this idea. It helps me remember what I did if I have a video to review. I probably spent more time setting up cameras and lights than it was worth, but it was a pretty intense scene. I adapted it after the lights and cameras were turned off so I was further up the bed and I could make it tighter. The reason to move further up the bed was to be unable to reach the bed frame with my feet.
Getting this tight, using only the weighted tightener on the ankle+genital rope, just wasn’t getting me to where I wanted to be, which was to have my hips elevated and my legs outstretched, such that I had to hold my legs and hips up to reduce the strain on my genitals.
The way I solved the tightening problem was to add a tightener to the rope holding my wrists at the head of the bed. So first I let the weight tighten my crotch line until I was unable to reach the head of the bed to release my wrist line. Then, to make things really tight, I pulled my wrists tight, which got me right where I wanted to be. The predicament in the final configuration was having to hold my legs up, or having the crotch rope get painfully tight as the weight of my legs pulled on it.
This short video only shows the initial setup and a few seconds after the timer released my crotch rope. It was a good struggle, but I could use the bed frame to hold up my legs and lift my hips.