Gauge Question

Just finished working on my Dart gauges. Before I get into what I found, I want to thank 65 Dartman and RedFish for their help. I also have to admit that I was wrong when I said that my fuel gauge only had two posts. It has three just like y'all said. Do not know what I was thinking of, guess I was thinking of the voltage gauge as I had pulled the cluster out at least ten times trying to get it to work.
Anyhow, I started this morning around noon and finally got the gauges working like they should. All I can say is that when you are working on gauges be very careful and pay attention to what you are doing. Today I pulled the cluster another six - eight times before figuring out why the fuel gauge was not registering with key in run position. I did the checks that 65 Dartman suggested, checked the fiber board, cleaned the grounding post, cleaned the spring metal grounding strap that the third post slides into, and checked for current flow through the printed circuit board. Reinstalled gauge and plugged gauge cluster housing into dash wiring harness plug. Turned key, and fuel gauge worked!! Installed cluster housing into instrument cluster bezel, installed in dash, turned key on and fuel gauge did not work! Finally after doing this remove and install six times I had a brain storm!!!! Could it be that the fuel gauge needle was in a bind or rubbing on the gauge lens since it worked when out of the bezel?
Removed the cluster again from the bezel and took a close look at the position of the needle. It looked like the needle was angled up away form the gauge face. Took my small needle nose pliers and very carefully bent the tab at base of gauge needle until it looked to be at the same angle as the temp. gauge needle. Plugged gauges back up to check and everything looked good. Installed cluster housing back into instrument cluster bezel, plugged harness up, turned key on and gauge worked!!!! Mounted bezel back onto dash and checked gauges a couple of more times before installing the wiper switch, light switch, and ignition switch. I then turned the key on a couple more times and surprise, surprise the gauge still worked.
Started engine and guess what, the temp. gauge wasn't working. What now? Did I pull the cluster again? No, I remembered that I had changed out the temperature sending unit and thought I might not have connected the wire up. Sure enough, I had forgotten to hook the gauge wire up.
What did I learn from this escapade? Take your time, be careful when working on delicate parts, check your work and if you still have a problem come here and someone will help you out!!!!!
Again thanks.