www.jec.org.uk

I've no room for a four post lift, but these would help with working under the car, I'm not sure how I would get it that far up in the air though

Excellent.
Wouldn't want that size of diff falling on your head from that height though.

Safe as it may be, the thought of working under that lump, fills me with horror.

I`d be wanting the protection of a pit trench.

Mike