Nozzle Dial

Never start a print with wrong nozzle again!

Needless to say, I've had wrong nozzle on few times. 

Sizes in this are .25, .4, .6 and .8
There's space for 7 spots if you want to remix and add or remove sizes.
Angle between spots is ~51* (51.42 to be exact).

Model is 150% from original. Resize according to your needs. 
Inserting knob requires some forcing, and knob is bit stiff on first twists. Lubricant might help a bit.

GCode and 3MF's have color changes ready.