Tried this today... super fun using a 1" auger drillbit. The Geefix was really easy to install and feels rock solid.
However... I'd advise a 6mm exploratory hole first. One of the locations I was drilling was actually a joist. No Geefix needed as it was already good. Kinda patched up by inserting the Geefix circle into the new hole and screwing all three holes into the joist, but would've been cleaner just to have the centre screw considering it was anchored by the joist.
Tried this today... super fun using a 1" auger drillbit. The Geefix was really easy to install and feels rock solid.
However... I'd advise a 6mm exploratory hole first. One of the locations I was drilling was actually a joist. No Geefix needed as it was already good. Kinda patched up by inserting the Geefix circle into the new hole and screwing all three holes into the joist, but would've been cleaner just to have the centre screw considering it was anchored by the joist.