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I had a device I got back in the early 80s called a Tree Sling which I could never figure out how to use very well. 2 Questions:
1)How easy is it to learn to use effectively
2) I have a bad low back- can I sit comfortably all day- and I mean from pre-dawn to dark.
Thanks!
1)How easy is it to learn to use effectively
2) I have a bad low back- can I sit comfortably all day- and I mean from pre-dawn to dark.
Thanks!