Just wanted to share my experience, my margallan was giving 130 per 60kg cylender in city, i went to Eagle Autos I 10 markz, near bank alhabib, the ustaad there checked and found lots of leackage on kit side, he fixed all the leakages quiclkly , he had to open several nuts etc. to fix and test.
Previously my pick and acceleration was poor, but now its excellent, so any body having cng issues and looking for good machenic can try him. his cell 03015511942
now i will be looking for good ac mechanic, i heard of abu bakar in h 8, will check him.