I'm having an issue with the Barrel valve breaking off at the mount point. This is the second time. Enderle K style valve bolted to a Hilborn Shotgun hat. The first time I had had some tire shake and chalked it up to that. I bought another housing and transferred the internals to it. Made a couple of shake free runs and bam! another breaks on the burnout. I'm at a loss as to what is causing this. Car is real soft on the launch at 1.05 best ET is 6.60 207 I run a soft line to both the hat and port distribution blocks. I have seen both soft lines as well as hard lines being used. I have talked to others with the same setup and no problems. Any ideas please?