Tach filter needed for ready to run distributor?

Sounds more like meter problems, AKA the movement itself. There are all sorts of problems. Rough treatment damages them over the years, and I'm sure humidity does as well. Debri works it's way inside ad causes "sticking" of the movement. I have a tube tester that I gingerly and successfully swapped a similar old meter movement, using the scale off the original (they were same full scale current, 1 ma.) as the old oe was full of machinists grit