Fleetside bed assembly - do it A^% backwards?

[cortcomp]

I know most of you guys assemble your beds first, then wood, then move it to the truck. Well, i'm low on space, and seeing that most of the bedpanels sit on top of the wood, has anyone just put the bed cross sills on the frame, put the wood down, put a few bolts in everything finger tight, and then brought the bed sides and tailgates on last?

I'd like to do it this way because i'm out of room to assemble the bed separately, and because i'd like to bring the bedside "into" the tailgate vs sliding the tailgate in and scratching paint (not welding the bedsides to the rear cross panel like stock, i guess i could do that tailgate swing no matter how i assembled the bed.)

Thoughts on this? I don't mind the constant getting up and down and up and down under the truck and i have help, i guess it seems more sense to me than shimming the bedsides and stuff up and then putting wood in later?