I'm not going to repost everything here but here is a link to my 50g bimac setup build log. Custom tank from cg, custom stand and canopy by me.

http://www.mbrk.com/viewtopic.php?t=4194

I started to ask about cross bracing but I noticed you mentioned that is in the making. We have a 45 on a keyboard stand with an oak bottom addition but it still could have used additional bracing on the uprights. Looking Good!