On 04/04/2017 20:28, RJH wrote:

By far the best way I've found for a nail/screw free fix is.....
Expanding foam. Gun grade basic stuff that has a low expansion rate.

Which is the method I've been using. I tried it as a temporary fixing
and found it had stuck fast.

I use it for sticking all sorts of things these days.
It's my new building adhesive of choice.