Lisa, Stefan To get the PRMI locking we had to turn off all 2-stage ISIs. With the 1-day old heating of ITMY at 1.5W, and an alignment tweak, we got 6000cts of POP18. Unfortunately I am not 100% sure how much of that is alignment, and how much is heating. At UTC 08:4:33 we turned the ring heater to 4Watt total (2Watt each).