CrystalReport 3-level sales report - missing data if no row at level3

[dl29200]

This should be a simple thing to do with Crystal.
Haven't found answer despite many forum searches
- but this is only my 2nd night playing with Crystal.

Consider a sales report fetching data from 3 tables;
with simple 1-to-many relationships:
REGION --> SALESFORCE --> DEALS

Goal is to produce report looking like this:

 REGION A (details + stats)
    SALESMAN X (details + stats)
          DEAL M (details)
          DEAL N (details)
    SALESMAN Y (details + stats)
          <null>
 REGION B (details + stats)
    <null>
 REGION C (details + stats)
    SALESMAN Z (details + stats)
        <null>
 etc.

If I take the simple grouping approach with deals in
"details" view, and salesforce and region as groups
then the end report is missing SALESMAN Y, REGION B
and REGION C (because there is no deal there). But I
still want them to appear (for completeness and statistics
calculation purpose).

If I take subreport approach, well... I cannot have
a subreport within subreport so can't go beyond
SALESFORCE.

So what are my options? I am most likely missing
something obvious... Many thanks in advance for your
suggestions.

Dave