After this successful trial......decided to buy our own cylinder......a little bigger than this one .....but small enough to fit in the jeep....
I found this Oxygen cylinder with capacity of 1.75 Kg of LPG.....
good enough/strong enough (main concern)because it was supposed to be in the jeep...:D..fitted LPG valve on it...and regulator as well....filled it with gas..checking for leaks..
