Printed this for my wife yesterday. Used 0.15mm layers, 20% infill, 4 perimeters, in ABS. Printed and worked really well! The only issue I had was that my nut did not want to drop into its receiver; I had to force it in using a 1/4-20 bolt I was fortunate to have lying around.
All in all, a fantastic design; I'll be printing a couple more next- One for work and one for wife to have a spare in case it breaks.