Lazyman
 commented about 10 hours ago
How about some magnets to hold the rear panel in place?  Place the magnets in the cabinet and embed some thin washers just deep enough that they sit flush.  

Are you using a router to trim the veneer on the edges?  When trimming veneer on an edge I prefer to use a knife.  Anytime I have used a router, I get some sort of chipping or tear out.  They make special trimming knives for that but I just use a utility  or Exacto knife with a fresh blade.    

EDIT: I just reread how you trimmed the veneer with a knife and looked at the pictures more carefully.  It probably does not hurt to score it on the backside but I usually cut downward from the front side.  It might also help to have much less of an overhang on the edge when you trim it.  This allows the wood you are trimming to sort of curl away as you cut.  
Thanks, Nathan.   Yeah, I'm definitely looking at incorporating magnets.  The challenge with the cabinet in its current state is that there are no positive stops on the interior to keep the panel from falling in.  A right-angle mount magnet can provide the stop, and the natural place to mount them is on the side panels. Then the washers on the inside of the rear panel.   What I don't like is that the magnet mounts would be visible through the cabinet from the front.  (Yeah, I'm getting anal retentive at this point.)  I have some cabinet catch magnets on order, so I'll check to see if they really are obtrusive before finalizing my plan.


 Pottz
 commented 18 minutes ago
new
ross the back that wont be seen looks better than the front of many ive seen. you do some beautiful work. i like nathans idea of hidden magnets. easy to remove when needed.
Thanks, Pottz.  Yes, magnets will almost certainly be on the menu.