dash gauge question

By the way, I cut the center leg of the regulator off as it is one in the same (connected) to the tab that is bolted down to the circuit board).
That ground wire should have been routed to a more direct chassis ground. Reason being... If that lil' regulator should loose chassis ground it will pass input to output, thus system voltage through the gauges. The regulator package from RTE does have ground fault protection built into its circuitry.
While I'm at it, You never needed to defeat a brad and get inside the gauge to disable the OEM limiter. We can simply take the 12 volt supply out of the round harness connector and route it directly to the solid state regulators input. It serves nothing else on the panel so there's no need for it to attach to the fuel gauge or panel. You could have omitted the noise suppression cap also.
Next, more important step... Lift the fuel gauge from the housing and cover the strip of metal on its backside with electric tape to isolate the gauge can from chassis ground. Now it is mounted like any 2 post gauge. Even if the limiters winding is shorted to the beam, the 5 volts cannot find a path to ground there. The OEM limiter becomes dead weight.