I run the Reedy quad mag 19T in my OM 21 with an x435. Did so at the Trent Hare Classic last year and will again this year.
I didn't get a chance to test my N-1 setup at MC-5 too much, but it also ran an X435 with a 27T in the same boat. 1:41 was my best time with the 27T, and I'll get my...