Posted by Ed Page on 29/03/2021 09:03:26:
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Worst case if this is a mistake then I will modify for long bolts and fill in the grooves with lead to dampen the holders. Might even do one as a comparison for my own curiosity.
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Having worked in a vibration test-house … might I be permitted an observation ?
Shorter bolts [HT Cap-heads] down deep counterbores, generally give a stiffer fixing than long bolts.
MichaelG.