sm_jamieson wrote:
The *best* solution may be to purchase something specific. However I
usually end up tweaking something genetic that I have. So, normal
rawlplugs, just cut off the rim. If you want a "sheath" all the way
up, a cheap frame fixing (e.g. from toolstation), trimmed to suit.
Simon.

Thanks. I see the merits of that if it's just the odd job - though I'm
put off by my incompetence which means I've all too often nicked a
finger doing it with whatever wrong tool was at hand
--
Robin
reply to address is (meant to be) valid