Digital BW, The Print

Once the cart is primed, the bottom-fill adapter is not used -- as long 
as the cart has not run dry.  Usually, I just remove the cart if it is 
getting very low, pull the plug over the reservoir, and squirt in some 
ink.

The only problem I've had with the auto reset chips is that they do not 
accurately tell me the ink level.  As such, I find myself ignoring the 
indications that the ink is low.  If I do run a cart dry, then I need 
to re-prime it.  But it's not a big deal.  I do highly recommend my 
bottom fill adapter modification, however.  
See http://www.paulroark.com/BW-Info/Mod_Bot_Fill.jpg
They can simply be cut with a sharp scissors to get them to the right 
size.  These same modified bottom fill adapters are what I use to pull 
ink from Epson OEM 7600 carts, which I use as my sources for Epson UC 
inks. 

I have not mixed cart or chip types, so I have not seen those problems.

Paul   
www.PaulRoark.com