Liz,
I don't have a workshop of any sort at my place, a friend of mine does.
He had some plywood laying around his garage.
He put together this chair over a few days.
Of course, having the right tools and workspace are a big plus.
Here is the finished product.
I use it with my 12"LB, it certainly saves your back and isn't heavy to carry around.
It's collapsible size allows storage and transport in the smallest spaces.
It's definately a necessity!!