Digital BW, The Print

I'm sure people have tried this, perhaps succesfully and I thought I'd 
ask before I spend a lot of time on it.  No sense reinventing the wheel.

I have some great QTR profiles for my 2200 using UC color inks.  I want 
to build the same sets of profiles for my 4000 using the same inks, but 
of course, the 4000 has different ink limits.  The profiles on both 
printers will be based on the same printing parameters (2880 dpi, 
unidirectional, ordered).  I was wondering if I can simply open the 
2200 profile, rename it for my 4000, and simply reset the total ink 
limit and relinearize for the 4000.  I am assuning that the 
relationships between the inks would be the same percentage wise from 
the 2200 to the 4000.  Will this method generate good profiles, or is 
it necessary to start from scratch to get excellent profiles?  

If such a method does work, how do people do it?  I was thinking of 
determining the Black ink limit conventionally, plugging the new limit 
into the repurposed profile, removing the linearization information, 
and reprinting a target for final linearization.  

Thoughts, cautions, results?

Thanks, as always.  

Lou Dina