Carl, believe me, I have tried!!!!!
Unfortunately, neopreme is an "approved" material for use with ethanol (by our government). Thus the companies that produce the diaphragms have no interest in going with a better material.
Buna N rubber with embedded fiberglass threads is a better material. Unfortunately, to date, I have found no USA supplier that makes the Buna N in a standard thickness for use in the diaphragms. The Buna N manufacturers WILL do a special run, but the cost is just plain astronomical. Perhaps it could be made offshore, but I think most on this forum know my feelings about offshore parts. As long as I own my company, there will be NO offshore parts in my kits.
And even if a special run of the Buna N were made, do not know the exact required thickness. The diaphragm is molded with a steam die, and it would take someone more conversant than me with shrinkage/stretch factors to get it right the first time.
51Bowtie - this forum, like most forums allows each user to display a profile. Clicking on the username for any user will allow access to that information that particular user has provided.
Jon.
