A new sefer was just published based on the shiurim of Rav Moshe Shapiro ztz"l given to a select group of Talmidei Chahomim in Mishnayos Keilim. It is AWE-SOME.
Here is a shiur based on the sefer. [I hope it is the first of many even though I have a sneaking suspicion that it will not be very popular as the "oilam" doesn't seem to be so "into" Keilim. Fortunately, I don't get paid based on the number of listeners. A flat 6 figure rate (000,000) and that's it...].