Set idoc Packet Size to always be a single packet

Hi All,
WE20 config has a field for packet size.  If I set it to 1, the system will create 1 packet/LUW for each idoc.
If I set it to two, it will wait until there are 2 idocs available and then create 1 packet/LUW for both idocs.  however, if that second idoc is never created, the first idoc will never be sent.
Is there a way to specify that the system always send 1 packet/LUW for any number of idocs?  So lets say today I created 10 idocs - the system would send that as 1 LUW.  Tomorrow, I create 25 idocs, and the system would send that as 1 LUW.
I'm guessing the answer to this is NO, because the system will never know when to stop waiting for more idocs and send them to the receiving system already.  The PI developers here are looking for a way to avoid implementing BPM, because they say it will cause performance issues.  This was suggested as an alternative.  As I said, I doubt it's possible, but I wanted to make certain before going back to them with that info.
Thanks,
Bryan

For some reason I was under the impression that RSEOUT00 wouldn't send the idocs unless the number had been reached, but I see that is not the case.
I always make things more complicated than they need to be.
Thanks!

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