My quick and dirty repair of the power inlet module lasted about five weeks, and then burned up, as seen here:
So this time I ordered and installed a replacement part (Interpower 83110131) and got a new power cord.
Instead of the excessive 20A fuses that came with the laser, I installed a 15A fuse. I plan to measure the actual current draw soon. Full Spectrum now says it should be only 5A surge and 1.5A continuous. However, when the laser was first installed it was popping a 15A circuit breaker, so I don’t believe their numbers. If I can drop down to a 10A fuse, I will, because that IEC connector is only rated for 10A.