the fitting perfecting can never be achieved by the local mechanics...cuz company uses machines to place the cylinder and company always makes proper place for the cylinder to be fitted..they dont only make stand...the build the place for cylinder to be fitted perfectly so that it dznt look bad....wen company fitts they do many tests but wen a local mech fits he only tests whether the car is wrking on CNG..or not....
secondly the biggest thing bro....FF CNG dznt end the warranty of car..if u fit a CNG in petrol car on ur own...warranty is no more valid after that...