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jack,
if reader goes into "opening reader" state, it means you didn't really do "10 resets".
The 300/505's have the following feature: if reader dosn't reach some "safe" stage for more than 10 times, flash memory is wiped and reader switches into firmware recovery mode.
In this case on the reader you see a message that tells you that firmware update has failed and askes to install it again.
Now, when reseting the reader, do it right after it flashes the screen and starts booting, before it reaches "safe" state. (you can't really tell when he does o rnot, but reseting right after screen refresh after reboot works)
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