I have the front fiber optic sight and a steel rear sight on my Glock 17. love that combo.

what is ur Performance Aim ?How do u want to use ur NAS in the future ?Did u consider to go for a more modern low Power Hardware environment ?

Shorting the wire to the sender to ground is the easiest way to identify a wiring issue. However, I very much doubt it is the IPVR since it also operates the fuel gage, so if it is working then it is...