nakakainis lang sa eroom.. parang may pagkaincompetent ung mga mekaniko nila sa makati branch nila. i had my car converted there and was very unsatisfied. i had to bring it to them for retuning twice because of very low mileage. i usually get 12-14 km/L city/hway on petrol. and on LPG it dropped to 7- 8.5 city/hway. they said it should only drop by 10 percent and mine dropped to 40%. had the idling problems too. after 2 trips to have it retuned, i still got the same problems. and i got tired of going back to them. triny ko kalikutin ung air mixture ko, not the LPG kit. and after a seried of test runs, it solved both of my problems. my FC improved to 8-10 km/L city/hway. and no more idling problems. still not too happy with their kit. but for now, it will do. i'm still busy kc to go to their other branch.

anyway, to answer abetg's question. No, you won't need to pay anything when you bring it to that branch.