I have modded a couple of times a V14 (SPU lens) with Matrix Infinity V1.68
Sometimes I got the RSOD when starting a ps2 backup game on DVD+R.
This happened maybe once or twice in more than 1 consoles.
Also I have been called by a customer, who bought one, and he used bad media, and had this all the time.
Have you also seen this with the MI 1.68 in a V14 ?