When I write the following rhythm with Finale's presets for beams I get this result:
This is rather unsatisfactory because the broken 16th beams make it visually messy, the first of the 32nd beam stubs in each group are turned the wrong way, and the rests are too high, colliding with the 8th beams.
If I change the beam settings (in doc opt) checking "extend secondary beams over rests", this is the result:
Now the 32nd beams are turned in the right direction but too long and I can't figure out how to shorten them.
This is the result I would have wanted from the start, also the one you find in, I think all, older editions (Beethoven's 4th symph., sec mov.):
To acheive this I had to change the notation in ex. a by the following steps: 1. extend the 16th beams, 2. switch the first 32nd beam stub in the right direction, 3. lower the rests by two steps, 4. lift the beams app. one step, 5. copy the first group twice. This is absurdly circumstantial.
So, I have to ask: am I missing something obvious?
If not, my suggestion is that Finale would reconsider the beam presets. I'm not sure when, if ever, you would need the rather strange notation in ex. a.
(By the way, I did NOT make an engraving of Beethoven's fourth (!) but of a 'Musical comment' on the same by a Swedish composer. He also made extensive use of this motive which cost me quite a few hours of work. Also, because measure widths were different in the parts, I had to readjust practically every measure containing this motive there as well!)
Finale 2.0 - 25.2
Windows 7, Mac OS 10.8