Kawboy wrote: If you take your set up and add 1/8" needle valves in the vacuum lines before the gauges , you can throttle the vacuum to each gauge and get the flutter down to near nothing.
Pretty much this right here. When I bought my gauge sets off of Ebay (which look very similar to the set you have, only with 2 instead of 4) the valves came included. You can damp the needle flutter down pretty far, and makes the sync process MUCH easier.