I'm interested in these Freedom Breeder build to suit racks, where they build them with the amount of levels, tubs & heat that you need. Has anyone ever done this? If so, how did you like it, and did you ever order more levels to add to the existing ones? Thanks in advance for any help.

http://www.freedombreeder.com/fb-med...d-to-suit.html

There's a link for anybody wondering what the heck I'm talking about.