Lol, i bought one of THESE XSPC M20 to G1/4 adapters specifically made for the Photon. I was upset that it only comes in chrome and black chrome. But i noticed recently that the BP Fill Ports have similar threads and it seems to screw into the M20 port just fine. The BP Fill Port has a much longer threaded area, so i'll probly dremel it down to size if i use it there. Gives me alot more color options if i stick with the Photon though
The top port is definitely meant for a fillport, but fillport/drainport/air exhaust generally work off the same ports. I'm sure i'll use a T or L fitting to do it
well I would just need the air exhaust valve as the fill point for my loop is above the Reservoir.