I have a 10 by 12 with 4 concentric loops all with original K-line 031, 072 and 042 switches. About 30 switches on the layout. I have only had a problem with one and it was easily fixed. I like the track also, but I do add pins.
Lionel made all three switches and I have a few of the 072 versions. They did not work as well, and required a higher voltage. So hopefully RMT uses the original K-Line spec not the Lionel version. G