I made “something similar”, and for all you lawyers out there, I did not use any info from this website.
It will be interesting to see if low tension/long duration stretching will result in gains.
Right now it seems like I can’t get enough tension from it, but we will see.
My design uses a sock, like for a sock hanger, on one end (head attachement), an ace bandage with a loop on the other end (for the base loop).
The 2 ends are tied together using a stretchy velcro armband like the type used to hold an MP3 player on your arm while running. So I can tighten it by pulling on the armband and sticking the velcro wherever it needs to be.