Without dismantling the rack I think you could do what you say Mark.
If I recall I think the holes are centred top and bottom of the flanges, can’t think of anything on them that makes them fit one way only.
Yeah, backwards is an interesting idea…
Guestimation I think it would leave the back nearly flush.
Great idea Mark, easier to plug stuff in!! 
And the front is presumably rarely accessed on a PAC
Right, the case has arrived.
Remember I don’t have a Qu-Pac - I want this for something else.
Not as heavy duty as other rack bags I’ve got but, as I never intend to throw it around or stack things on top of it, it should be fine. Slightly disappointed though. Seems to by 8mm ply sides, top & bottom, but there’s only a thin padding to the two lids. Mine was suppled with a generous 24 captive nuts & bolts fitted.
The position of the rails seems to be symmetrical, so front & back are the same.
Front rail to closed front lid = 20mm
Back rail to closed front lid = 240mm
So, off the shelf, no good for the Qu-Pac. But, the rails are each attached to the sides of the case by 4 small screws. I’m pretty sure that it would be no problem to just move the front rail back by 35mm, or whatever distance you deem necessary. What may be a problem is seeing the screen if it’s not close to your eye level though, as the top of it is going to be quite a long way back.
So, I think you could use this case for a Qu-Pac with only a little modification, but if it were me I think I’d spend a bit more to get something slightly stronger and with a bit more space to get at the front panel.
(Off topic update on that case)
So finally go around to fitting stuff in this - or trying to.
Horrible!
The rack strip seems to be bent in the wrong place, making the holes too close together across the width. I intended to mount a 1U CD player, 1U mixer and small drawer which are currently in a much larger, heavier case. I can just force the drawer to fit, but the CD & mixer will not go. So while the case itself is big enough, I could not use it as intended.
I should have sent it back, but I had some proper bits of rack strip in a cupboard, so I’ve swapped it for that.