I decided to try the 'miniVCI' and learned some valuable lessons. One is the 1.4.7 firmware version can not be 'upgraded.' Without 2.0.4, the miniVCI has trouble with our 2010 Prius but no problem with our NHW11 (2001-03 Prius.) I do not have an NHW20 to test but I suspect this older, miniVCI will work. If it doesn't, I'll do a full refund except for the shipping to return it. I half want to find out if 1.4.7 works with an NHW20. Anyway, I set up a 'silent' auction announcement in "Private sales" if you have an interest. I know it works with our 2003 Prius and only half-works with our 2010 (it does not report engine ECU metrics but it does do the hybrid vehicle controller.) I'll see if I can throw in a 'pirate eye patch' or 'do-rag.' <grins> Bob Wilson