Right now the design aloes me to clip onto it while the turnbuckles are fully retracted, giving a slight stretch. The turnbuckles can then be extended about 2” which is more than I can handle and almost bottoms out the springs.
@ExSS - I’m not quite understanding how the length of turnbuckles is extended by their placement across from each other as opposed to side by side. I’ll reread your question and try and figure it out.
@Midthigh - Yes the Velcro is just to “kink” the tubing as it comes through the holes to keep the noose tight. Actually I found it holds the tubing tighter if it’s wrapped between the sled and the penis. But a second strip of Velcro could easily wrapped over the penis as well.
For the version in the photo I actually ran out of 1-1/2” pipe so I cut a section out of a 1-1/2” tee fitting to make the sled. The enlarged ends are the hubs from the two ends of the tee. Turns out even better than the pipe as it allows extra room for strapping.
Keep an open mind and a closed wallet... unless it's open to making a donation!