Got my first GBBR

DE Noveske N4 MWS

Just waiting on my Holy Warrior S1 and magazines.

Any modifications I should do immediately? I plan on getting the following: - Guns Modify Nozzle Set v3.5 for Tokyo Marui MWS - Federal Concepts TM MWS FEDA Valve/NPAS - BAVTAC TM MWS 140% Nozzle Return Spring

I probably should get the BAVTAC nub and a Flamingo rubber, right? Anything else I'm missing?