i would just hold onto the z32 afm for now until you have a proper set up that can fully utilize it.
i have the same set up as you pretty much,,
-a pod but just switched back to panel and airbox.
-split dump and 3inch exhaust all the way.
-10 psi actuator but running closer to 14psi.
-safc neo with zeitronix wideband.
install the afc and wideband and take a crack and road tuning. you will notice a difforence.
crappy thing is you can adust fuel all the want but you cant adjust timing so you wont be able to make it perfect which is why the pfc or nistune ect is used. but go nuts,, have fun,, learn and be careful. dont let it go too lean !
throw down here what you ended up using for the rpm settings and ill stick mine down just for curiosity sake.
if u find your still having a bad flat spot make sure you check the condition if your fuel pump, coilpacks and sparkpugs.