I wrote a new search in ALS_DIFF to hopefully help with our issues finding IR resonance during this step in locking. Previously the node would go to 3 or 4 past saved offsets, then if there was a little bit of signal it would try to find tune. Successful offsets seem to always be around 400 and 3250 +/- 100, so there's no need to search the entire range. I have it get near these saved offsets +/- 150, then step 30 at a time to look for for any power. If no power is found around this saved offset, then it will move on to the next saved offset range. As long as I move in the same direction, I didn't run into any odd hysterysis.

This ran successfully a handful of times and seems to be decently fast.