Thought with this model I will do a step by step progress , the rough mesh sketch out of a gas bottle trolley, the cylinders, and the trolley base and wheels, will also show how to add the wheels normals without having to model the wheel tread.
right now doesn't look like much, but going to make the curves for the metal supports, next,. will only edit the post as it's updated.
the curved metal supports.
Detail added to the supports, next it's the hooks for the gas tubing.
Just the gas bottles left
All Done
Win7 64bit----iCore5 4590 @ 3.7GHZ----AMD RX460 2gb----16gig ram