Look at the height problem from a completely different angle and you
end up with an adjustable height chair.

I use one with my refractors and find I can see far more detail when
perched than when standing up or crouching.

Have a look at Yahoo Groups: Telescope Observing Chairs. It's a small
group with relatively low activity but full of good ideas.

Their gallery will save you reinventing the wheel. (or the observing
chair).

http://groups.yahoo.com/group/telesc...guid=100228709