I wouldn't trust a bottle jack lifting a car as said. Plus the ones I've seen have been too tall to fit under a standard height omega anyway.
If I ever get this bloody welder working I intend to weld a nut on a scissor jack handle and wiz the car up with my impact wrench.
Equally unstable as a bottle jack so insuring the car is well chocked is obviously vital or it will topple off. But I just get do hacked off dragging trolly jacks around/pumping the car up/drag it round the other side/pump the car up. Repeat to drop the car, sigh, they're heavy, noisy with metal wheels and the noise rattles through both our house and next doors through the Tarmac.
Of course moving the mv8 away from the garage door would help, but its "got no rather wheels man"

A bottle jack has too small a saddle area concentrating too much pressure on the metal work of the car IMO.
Given how often I jack mine up I was seriously considering one of those built in air jack systems they use in Ausie and German touring cars. Afix air line to the car, four rams lift the car off the floor. Seemples
