My reverb tank was bad so I replaced it with a Belton 4-spring 4AB3C1B, and while it sounds great and full, the decay is much too long for my tastes. I am afraid to switch it out for a shorter Accutronics tank because it sounds so good as is. Is there any trick out there for quickening or shortening the decay of a reverb tank? I have heard of people putting small amounts of cotton where the springs connect in the middle to dampen them and that works. Does anyone know exactly how to do this or have another trick up their sleeve?