Legacy Loco with Cab-1 Compatability

There are no problems using the CAB-1 with a legacy engine other than not getting the latest features

No problem here running my tmcc engines with legacy. They run even better using the legacy system. 

Nope no issues, and legacy locos still peform better than TMCC locos even when legacy locos are run with TMCC. Lionel has done a great job of "including" the old TMCC user. Instead of a quillable whistle, you'll have a variable whistle. Chuff intensity will increase automatically for legacy steamers and RPM levels will respond to throttle increase automatically as well for diesels. Any added smoke features will still function under tmcc. The only thing I would be concerned about is that once you get one legacy loco you'll want another

Thanks.

I'll take this info as a go-ahead for a Legacy purchase

I had no problems during my time using TMCC and switching over to Legacy was very easy, just disconnect the wires and put the Legacy right in the TMCC bases place. You will like Legacy it is much more fun not having to push AUX1 R to open subway doors now. Plus as someone above me said you'll want more Legacy trains, I know I did!