I also put in a Victorinox mini screwdriver in the corkscrew, perfect fit.
To change the handles was easy, i used a thin steel
rod into the tweezer and toothpick holder. Lifted up gently - then use a flat metal tool and lift gently.
I used a wood vice to snap the scales on but first lift up the corkscrew since it is wider
than the scale. Make sure the handles do not warp after.