On Tue, 08 Nov 2011 16:36:17 +0000, John Rumm
wrote:

usually when fixing to a stud wall, you can arrange for at least one
rad bracket to align with a stud. Then you only need a PB fixing on one
side).

Thanks for all the replies. A no-name tool arrived in the post from
Tool station today, ready for next time I have to use these fixings.
Now that I have got one, you can guarantee I won't need to use it for
a while!

Sorry if I did not make myself clear; my remarks about under and over
tightening were about using screwdrivers, not the setting tool.

It's an interesting point you've made about fixing one radiator
bracket to a stud and the other to an anchor. Fortunately, the only
time I ever fitted a radiator to a stud wall, I built the wall first
and positioned extra studs where I knew the radiator would be, but now
I know for next time.

Thanks again everyone.