Yes - I had that putting a rawl plug in for a mirror. 14mm plug, had to use a 13mm bit and 'wiggle' it adventurously in the hole. Luckily plasterboard is more forgiving than shiny, on-view, wood.
Looking very nice btw- I've been getting CWS* recently, so good to see build progress afoot.
*Clamp Withdrawal Syndrome (unscrew before withdrawing...)