Catt, I don't know what kind of tips you require about the Unimates but, here's the sum of my knowlege/experience. I think they are made now by red Caboose, will have to research that later. They will mate well with any knuckle type coupler but must be hand coupled/uncoupled. The best (easiest) thing about them is that they will install anywhere a Rapido has been installed, in the same pocket and with the same spring. Though not related, I did have to modify the shank slightly to fit the early LifeLike FA trucks. If you need to experiement, I think I can scare up a pair for you to try out. They were easily installed on the Kato EF-15 but, due to the different coupler, not so on the Tomix EF-15.