To make what work? I thought you were going for standard remote controls. In any case, the command Fastrack switch is backward compatible with the previous versions, so I don't see how you have to buy anything special, just buy the command switches currently offered. They'll do for your current environment, and they're also suitable for the Legacy/LCS environment.
If you're talking about the need to use the STM2, that's a requirement for any switch machine to truly get the actual switch position under all conditions.
