In an earlier contribution to this discussion,
Dave wrote:


If I were to end up with quite a large hole, what would the bond
between the filler and the wall be like? I am assuming that the plug
would be a snug fit in the filler, but what about the filler to wall
bond? After all, it can't expand when the screw is inserted into the
plug.

You may be able to screw straight into the filler, just drilling a pilot
hole, and not use a plug.
--
Cheers,
Roger
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