Digital BW, The Print

I recently purchased a new 1160 from Geo Data which I set up with 
original Epson cartridges and then switched to MIS quadtone.  I would 
now like to try the Piezo driver and cartridges.  It appears that 
many of the regulars in this group switch between cartridges and 
systems very frequently.  My question:  is a return to Epson carts 
between MIS and Piezo recommended or is flushing with Piezo 
sufficient?  TIA
                                                John Davis