Between the back and front plates of the body, rubber seems to be fine (opinion Chunny?) - either a tiny washer cut from old tyre inner tube material, or a thin sliver cut from gasket tubing.OrthoSean wrote:Thanks for that, I see them now! Somebody had replaced the back plate washers on mine with rubber instead of leather. Time to fashion some leather washers and start having some fun "tuning"!chunnybh wrote:The first picture shows where the leather washers are placed. Between the spring. They are also placed on the three backplate screws. Another adjustment is to play with these three back screws, that is slightly adjusting the pressure of the gasket rubbers on the diaphragm leaving a minute gap between the main body and backplate.
Again, thanks!
Sean
(While on this subject: deep appreciation to Ian Maxted for his kind and highly esteemed input on such matters)