I'm in the process of buying 3 250-MHs and 4x96w CFs. The existing canopy is approx 88x26 and everything will fit with the MH basically centered and the CFs in the corners but it will be a tight fit. I'll also need to raise the canopy about 3-4" to provide better clearance for the MHs. Problem is accessing the tank for maintenance and feeding for that matter. Anyone know of a better setup? Thanks for the help.

What about doing something like this: http://www.bostonreefers.org/forums/showthread.php?t=42540

Or maybe even something like this:
http://www.reefcentral.com/forums/showthread.php?s=&threadid=866547&perpage=25&pagenumber=3:eek:

Decided on this modular approach (minus the rollers part) from Melevsreef to house the lights and just build onto the existing canopy.