My readings, Gundam Stick, no Op Amp, no resistors but with a 3D printed restrictor based on nems measurements.
Feels good. Played a lot on a friends original and dont feel any difference. Plays great with this setup. Managed a flawless clear which gives you the 3 extra stages on normal for the...
Controls will not work through the supergun and Saturn uses a decoder fir the signals as far as I remember, so you would have to directly wire the 2 pots in the controller to the G-Net PCB.
more around the fitment of the nuts and the dept of the screw holes. Depending on the filament, the sides can sag a little which leads to those gaps. Depends a bit on the printer too.