I will have to get my girlfriend Guinevere from KA tools out and show you her at work with a Microplane rotary file attached.
She will enlarge your orifice quick smart.
You may like her as she comes with a small hand pump to inflate her accessories as well.
Not forgetting our very own Little Aussie battler Kev Inkster and his arbortech products.
you could possible relate their performance on wood to a croc or great white.

BTW ...speaking of Kev you may like scooting off to the bottleo on one of his own designed personal hovercraft that  he was last seen hooning around on at the 2000 olympics!




Regards Rob