Hello,
Currently there is no modification need to be done in any car.... for now... you just need to take out your Default CNG Switch grip and attach with New Digital Switch.. and accuracy can be adjust by sensor volume adjustment.
and yes this is only for Karachi... it was my personal project.... but now im doing production... the only problem still im facing where to place LCD and because we don't have any space available according to LCD size. so i simply created a LCD size box and can put the box in front of Speedo meter or on dashboard.. or we can cut and make the space on dashboard if user depends....
User can install this by themselves but... i recommended let us configure it for you for better accuracy...
Thank You