Your first rack? Wow looks like a killer system`.

So why can't you use lacing bars? Your deepest piece is the Request and from the pic it looks like you have room. You should have clearance behind the amp as well if you lose those bulky banana plugs. Then just order an extra set of rack rails!

Also, if you are going to do thermal management you're going to have to run your cables through the knockouts so you can put the rear door on.