Check this out Peter,
http://stargazerslounge.com/diy-astr...ding-pier.html
As per Bojan's suggestion, I came across this the other day when sifting through DIY obs designs. If you get an old style plastic bin with the metal clips to hold the lid on, then when it is inverted, the clips clamp the bin down to the circular "table".
A bit of weather stripping on the circumference, and it would be nice and snug, maybe a solar powered fan mounted on the side with a little silicone aroung the cut would keep the moisture down, just as long as you drill some holes in the table board and mesh them with fly screen to keep the bugs out....
This is my current plan for a pier in the back yard without having a roof over it. Keeps the HEQ5 ready to go, mount the scope, power it up, BAM.
Cheers
Chris