In article . com,
"Mathew Newton" writes:
In case you haven't worked it out, I can highly recommend stand-offs
(or at least specifically the 'LadderMax' one I've got).

Ditto.
I use the Wickes one which easily clips on to a ladder.
It doesn't have a shelf, but my drill easily sits in the
metal framework of it. Make sure it includes the spring
clip -- I've seen them on display with that missing.

--
Andrew Gabriel