Tach filter needed for ready to run distributor?

rt-eng has this on their FAQ page. Seems promising.

My tach needle is sticking, how can I fix it?​

If your tach needle seems to be sticking, back off the jewel screw (under the tach board) 1/4 turn to free up the needle. You can tell the needle is sticking if you move it up and then it does not automatically go back to zero reading using only the spring pressure. You MUST fix this problem before you try to calibrate the tach board!