After today's flying, I noticed that the tank on my recently acquired Super Staris SV-26 is loose. Very loose, free to move 1/2" up and down. We had difficulty getting a consistent engine run. One click of the Enya NVA got the Enya 60 AAC changing lap times by a full second.
Clearly, securing the tank and starting over with the tank height / needle adjustments is indicated. Though I remain curious about the expected effect of a loose tank.
Somewhat related, the tank is a "magnum" style, meaning it has long curved uniflow and vent tubes, a design that stresses the solder joint where the tubes enter the tank. One suggestion I got is to use silicone caulk over the fragile solder joint, making it stronger. I also have some 3M auto bumper repair epoxy that I could use instead of silicone. Because that type of joint is so notorious for failure, I was treating it very carefully, handling it so lightly that I did not detect the massive looseness earlier.
Present plan is to test for leaks, secure the tank and try again to dial in the rig.
thanks,
Peter