The original Ramsey FM25 was a toy, and had a range of maybe 50 feet on a good day. Latter day versions became quite reliable. I am not familiar enough with them to know what improvements were made, other than that they were.. Perhaps as an outcome of your conversation?

In any case, the 100B is an entirely different beast from the 25, or even the 30.

Peter Wieck
Melrose Park, PA