Mounting a rectangular plate on a round tube. How? SORTED.

[syncropatrick]

I have a device which I want to mount on a round pipe.

Device has a rectangular foot 80x50mm with a 6mm bolt hole in each corner. Device weighs about 500 grams with most of that weight 50mm off centre. Device needs to be held securely.

Pipe has raw OD of 25mm, or with rubber sheath on it 30mm. Pipe has been powder coated and I'd like to be able to remove clamp and not have damaged pipe finish.

Any ideas?

[syncropatrick]

Answered my own question - use a TV aerial pole bracket!