I have seen backchecks catching hammers that were too fat. If checking is very high, and hammers are very fat it can happen. The hammer bounces down hard enough to get caught. See if you can push a hammer down on the backcheck. I've only seen it once, but it can happen. dave _______________________________________________ David M. Porritt, RPT Meadows School of the Arts Southern Methodist University Dallas, Texas _______________________________________________
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