Been looking into these because I am going to be fabricating one.
I know that a cardboard box and a fly tying bobbin will work, but I don't have the experience (and probably not the skill) to use an ' impromptu' device like that. Am sure some people can wrap rods effectively with just a spool of thread. I'm not one of those people.
Have basic wood tools and skill and a bunch of 3/4 board scrap to work with and a threaded rod, washer, wing nut spring tensioning set up is available at just about any hardware store.
Is there any real advantage to that cantilever style over a rod wrapper which is fastened to or just sitting on m a tying bench?
My goal here is to build an inexpensive tool which will make wrapping easier, less frustrating and more fool-proof for a first-timer.