Jon,
I think that you missed my point - that JMRI _can_ display more than one throttle at a time. Whether it _will_ can be a different story. As you point out, some _DCC system_ limitations can affect JMRI's capabilities, such as the maximum number of throttles which may be opened. Remember that one of the good design decisions of JMRI's developers is that limitations of one DCC system are generally _not_ forced upon users of other DCC system types.
The very first post in this thread revealed that the original poster _can_ create a second throttle, he just _cannot see both_ the first and second throttles _at the same time_. This means that the original poster is configured for a DCC system which _does not_ limit JMRI to a single throttle.
Regards,
Billybob
