Well I am planning to build a 6 tub 41 qt rack and I need to figure out if I really should put and access door on the back in case I need to change flexwatt. Is this something I really should worry about? Am I over thinking this?

I was going to have 4"" boards on either side of the back to hold structural integrity and have a a 10" door down the middle. I don't see people doing this so it probably isn't necessary.