Hoyt
I started with a TSS climber, they didn't come with a seat and it was a long day standing all the time. I used a folding seat like that ONE TIME. After the morning hunt was over and I nearly fell off a couple times I hurled that seat as far as I could throw it from the stand!LOL, I had forgotten all about that event 'til I saw your stool.
HighNTree, before I would sit on an unattached seat I would just get a new climber without the bar. Or maybe pick up a Lone Wolf seat to use with your base.