Just put a top pin on it and the two side plates/bars on the lower tray. They'll stop it jumping out sideways. Without the top pin it just moves the stress to the lower plate and fractures the lower metal sandwich plate behind the exhaust ports. Even the XS plates do that coz they can't run a top pin. And yours is a copy which is real heavy and make it worse.
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Class 3C Mono EPA National speed record holder 95.35 mph Avg!
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