capturing Shipping weight override in COM user exit

I am trying to capture the shipping weight override in COM user exit UMBSHP6R.  
Although the 12 other fields that I am using in that file appear to have been 
written by the time UMBSHP6R runs, the shipping weight override field DHAAGY is 
not.

Does anyone have an idea of how I can capture that value in the UMBSHP6R exit?  
I thought of trying UMBSHP8R which probably runs a little bit later in the 
process, but it is not the appropriate place to run the programs I am calling 
from UMBSHP6R.

Any thoughts are appreciated

Josh Diggs
Information Systems Manager
California Fine Wire
(805) 489-5144x236