G'Day, Not sure if this item may be useful for observing,I saw this item on Ebay a company called "Deals Direct" I've bought a few items from this mob over the past few years and found them very honest and reliable, the item is a stool that can be adjusted in height.Here is a link, worth a look. http://www.dealsdirect.com.au/cart.p...letter12072006 Also here is there web page address http://www.dealsdirect.com.au Cheers NightSky
My worries with these would be how stable are they on uneven ground. A stool with three legs will always be more stable than one with a disk contact with the ground, do they go low enough for a dob set at about 40 degrees from the horizon and, also they do not appear to fold down for transport.
After saying that, if you observe from a platform in your backyard and your scope is high enough then go for it.
G'Day I was thinking more for the backyard Astronomer and being in the process of building a Observatory I thought it would be good, and for the price under $50 incl del,also the Office Works stool has no back support either and just under $100 plus del or pick up. Not sure how it would go for a DOB it would depend on it's size. here are the details of the size of the stool, it would suite me as I have the Meade LX90 and ETX 125 Adjustable height Maximum height is approximately 780mm Minimum height is approximately 570mm Cheers NightSky