Zealot

A few weeks ago I bought a new in box vintage HO athern hustler with genuin rubber band drivetrain. I had enough forsite to get a bag of new rubbers with it. After replacing the dry rotted rubbers, it actually doesn't run that bad. It has a little sling shot effect that increases with load. Have any of you done the Earnst Regear on one of these babies? Is it a big improvement?