I had 3 thick pads from a weight lifting set.. so they worked well for this. At each end is a heavy duty mounted eye hook. At the leg end , I use a Target Leather ankle binder. Very comfortable..and inescapable.. then attach it to the eye hook using a double ended clip. At the other end is a rope ratchet.
So first I put on heavy duty Pose medical restraints with straps and big D rings on my wrist ( sometimes I put think rubber gloves on before the restraints as well ).
Then for a release/timer I made my own ice lock.. some hold 15 mins, some 40 depending on the size. I attach this to one end of the rope ratchet and leave some slack so I can attach my restraints to it using another double ended clip. Once attached I use one hand to pull the rope coming from the ratchet.. CLICK CLICK CLICK.. the slack goes away and then i keep pulling as hard as i can .. CLICK.. I can get myself pretty darn tight... then after 10 or so mins I try again, and I usually get another CLICK tighter.
Unfortunately you can only pull yourself as tight as you can with one hand.. but it still feels great!
Its such an awesome feeling. You just don't know when it will release.
I even made a leg spreader attachment as well.. You pull your legs out first then attach the wrist... same thing.. but that one hurts a bit more over time.
I have added a few pics.
