Eureka!

In what could be called a second a HA moment, but in all actuality is probably closer to a DER moment, I suddenly realized that since it is the wrist and hand shaping that was affected the most by my sudden change in gauge, all I needed to do was rip back four stripes and reknit the offending portion.

I'm already back up to the thumb hole, and in a quick side-by-side comparison, both arm warmers are equally snug. At this rate I'll be done by tomorrow!

I R SMRT!