works well for me david..
have mine attached to top of tank very stable...threaded rod chemist to concrete tank then all the way through to bottom plate pier then bolted together.have timber base all around pod with 10mm gap against pier,same with floor of pod then silicon around pier... works bloody well for me..
see if i can dig out photo's and attach !!!!!!!!!!
or i'll bring my computer and show you at astrofest
http://www.iceinspace.com.au/forum/s...ad.php?t=38610
http://www.iceinspace.com.au/forum/s...ad.php?t=39055