G'day
I've got the 20x80s too and have been very happy with them. A bit of variation across the field of view but overall, very good value. I initially built a parallelogram mount out of aluminium tubing but still got a stiff neck from bending back when looking at the zenith. I then came across a light reclining camping chair and built a swivelling base and support arm for the binoculars. The "contraption" is very comfortable and takes only a moment to set up.
Here's a link to a cloudynights post I did:
http://www.cloudynights.com/ubbthrea...c=1&PHPSESSID=
All the best
Andrew