Vic - Thank you.
You are one of those people - and there are a few here - who, when somebody has a complicated issue, takes the time to jump in and offer a detailed solution.
And you seem to have an extremely in depth understanding of Cubase.
And . . .your solution worked.
But I kept thinking there must be some way to do it automatically with "Process Tempo".
I used your method and recorded the results and then backed up and wasted a lot of time.
With the inspiration from your approach I ended up with this:
1. Made sure all Tracks were in Linear mode.
2. Set the ruler to seconds and noted the duration from the first to the last Tempo node. Also noted the total number of Beats (this was 4/4 with 2 measures of 5/4 which I deleted cause I didn't want to deal with that).
3. Set the Marker Track to Linear and dropped a marker at the start and end of this section - just thought I might need them - maybe to reset the Locators.
4. Set the Locators to the Start and End points, also.
5. Deleted all the Tempo Nodes except for the first and last.
6. Opened Process Tempo. At this point the process range already showed the correct number of beats - so I simply set the "New Range" for the correct time duration and processed.
It worked. And material following was still in time.
I'm not 100% percent clear on the method - but I think it will work in most situations with some variation as to "Process Range" and "New Range" Settings.
Thanks Again for your help!