For anyone thinking about craming a naza v2 in to a tiny body... yes it can be done. Yes it needs force and yes it requires some diy.
I managed to cram a Pacer Tmotor 4in1 ESC and the Naza V2 in to a lumenier 5inch frame. You need an assortment of bolts as some need to be longer and others shorter. There's enough space to add a VTX onto and camera in the nose while adding the battery to the bottom.
I didn't use a PDB. I soldered the PMU from the naza direct to the ESC - pads and only attached the signal wire to the FC from the ESC. Everything else was cut and taped off.

I will be swapping the tape for sticky pads to hold led, RX and GPS module and using cable ties for the wires on top maybe some heatshrink to protect them.

As for the antennas. I will mount them to the rear arms at a 45ish angle and then find a 4s battery that will sit underneath. Maybe a 3000mah? (2-3 inch wide, 6 inch long)

I couldn't find much info online so here's my contribution to all those naza pilots that don't fancy a giant 10inch beast. Drone should be capable of holding a gopro on top if the wires ontop get moved out the way.