Thanks Adam¡ªmakes sense.
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I might also suggest to others the possibility of using medium-strength threadlocker like Blue LocTite (not red ¡ª which is permanent) on the existing hardware without tightening down every corner 100%+, which would alleviate a bit of the flex on the upper board. I feel this should work for me; of course, every build could be slightly different. And as the manual says, try to make sure the BNC is installed as flush/flat to the main board as possible, regardless of your hardware.
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I found it to be a fun and satisfying kit (especially after I identified all the capacitors etc :)?
Garrett kc3unp