Jaydodgce many thanks for the piccs! They are extremely useful but I don't have the expertise and the tools for that...
I think it will cost me less to buy an Accutronics unit than having a tech do the Dwell mod. Somebody has succesfully replaced the original Ruby rev tank with an Accutronics R8DB2C1C:
http://www.thegearpage.net/board/showthread.php?t=568396&page=3
But then I read:
Tragic, can you tell us the exact Accutronics model you tried?