Well for one you could bother to send the units to amazon in a product box with foam or some protection instead of a poly bag. If your going to blame amazon's rough handling you should probably do a decent job of packaging it yourself before sending it to a fulfillment center. Considering the package came in a large box of clothes with air bags I highly doubt it was anything to do with delivery.
If you wanted to assemble units without having the usb modules fall out you could place a plastic or some other material insert between the usb modules and the wall of the stratux case to fill the void and not allow them to back out. Seems like such a simple fix that would cost pennies and avoid issues and glue altogether. If you dont have someone who can design something in 3d ill be happy to do it, it would take all of 5 minutes if you send me the 3d file for the case.
Heat sinks not required is obviously an issue since without them the unit runs very hot and forces the fan to run almost constantly. After installing the heatsinks and a non generic fan it runs almost never and floats around 45c on the hottest days. Considering your saying crewdog and stratux store are one in the same I'm confused by the official listings showing heatsinks with the case and a branded fan. Why then cut corners on an assembled unit but sell DIY units with heatsinks and a Sunon maglev fan? You said "They have the EXACT same components", but clearly they don't.
https://www.amazon.ca/dp/B072ND582W
I think its interesting you ignored the assembly issues like the loose antenna connection to the case, defective fan etc. Did Amazon handling also cause those issues? You also ignored the common issue of ahrs drift that everyone else seems to also report that you keep telling us is fixed. Yes i also reflashed your recommended firmware and its still there.