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H/O 600W PWM Software update v1.21 Beta 2

There has been discovered an error in 10 boards that were ship.  If you experience the board go into lock after 2 seconds of firing you will need to update to v1.21 beta 2.

Software / Instruction for H/O board updates:

Latest software revision: (update v1.21 beta 2)

**Must have loader installed first. Unzip file and follow directions here.