do you think one of the biggest z companies in the US would've hired Ash to make their ecu's if it wasn't 'safe'? Ash and the guys at Z1 spent time and time again researching and finding the best way to program the ecu for results and safety/reliability. Also not an attack at anyone, I'm just saying, z1 wouldn't have put their reputation at stake by selling chips they knew nothing about. There was obviously a reason they chose to distribute them instead of jwt chips. This is just my opinion once again, choose whichever you want, you won't be disappointed either way.