Can I try this on any chair?
Because I have wooden chairs at home which are non-adjustable, have a straight back support that may be ending at my mid-back (not sure though), and have an outcropping below.
So, will that do?
Regards from India,
You can do this on almost any chair - you just have to figure out how to attach an element wihich will offer some friction to stretch up against, that meets your back somewhere in the mid-back (it's not important exactly where).