Some people have used a drummers stool that can go up and down, though i'm not sure how high it would go, for if your dob is pointing above 50-60 degrees in altitude. and I don't know how high you need to be for your refractor.
I think everyone should get or make an observing chair.. after I first made mine I didn't really use it that much, it was just an extra bit of a pain that I didn't think was worth the effort.
But I made an effort and started using it, and i'm amazed at how much more comfortable it is when viewing while sitting. You're not wobbling around, your head is not wobbling around, you don't get a sore back/neck/legs, and because you're comfortable, you can just sit for longer and take in more detail.
I got my wife to sit on the chair and look at Saturn for a longer time, just study it, looking carefully, and she finally made out the CD and the banding. When you're not uncomfortable you can see more because you can look for longer.
Of course you have to move the chair sometimes, when you move your scope, but it's worth it.
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