Digital BW, The Print

I have a 1280 with stubborn clog on the light magenta jet.  I'm using UT2 ink and thought 
I'd just go through life without yellow.  I probably don't yellow if I'm just printing neutral or 
carbon prints right?  So, is there a way to reconfigure Paul's curves so that I 
can put the "LM" ink in the yellow position and have the printer know where to find it?  

You're thinking I should just get rid of the clog?  I've tried repeated flushes with MIS nozzle 
fluid to no avail.  Maybe there's a better way.

Maybe there's a better printer.  I've gone through two 1280s now using MIS inks and it 
seems I've used most of my ink on cleaning and related test prints...  I get beautiful prints 
when it all works, but there must be a more MIS-friendly printer out there.

great thanks for any wisdom.  best, jonathan