API is a brand name of what I assume is very simular, that I have delt with before.
BIG PITA! http://www.apipanel.com/ The ones I was having a problem with were double sided aluminum ones. The arch's had not compansated for wiring in the design at all in wall thickness. As these things constituted structure of major portion of the exterior walls they cuold not be cut all but minimumaly for penetrations. Like a shear-wall.... (Which may be why your inspector is worried?) Sending all into a tizzy when they decided to use them as both the interior and exterior as the same panel. So my question was how would you like the conduit to look?! "Conduit?!" We ended up piping on one, and they sandwiched that and the boxes with 2" rings through another thin one, for the same appearance they had sold the customer on, at a heafty tune of $$$$$.
Back when I was looking into this, I think there were some that have "Pre-installed electrical Chases" in them. (Oh, how I hate to hear the word, "Chase". Makes me think of landscRapers doing thier own wiring, but that is a different story.....) Which would have been nice for the boss to realize before they poured the slab they were sitting on.... But then that would also require some sort of coordination between trades, that rarely happens, so the Chases" line up with each other. And so they go where you want them to go. Good luck!
Either way, I have never done it, but have little confidence of the system being productive for our trade.....