To be honest, I've never owned, wanted to have or even thought about a scratcher until I saw the printables scratchers flash contest. Wanting to give myself a challange I decided to give it my best shot. I came up with the Curved Collapsible Ergonomic Scratcher. 

Why Curved?

To use a straight scratcher, you have to reach above your shoulder behind your head to reach your back with the scratcher. This can be uncomfortable or even impossible of some people. Because of the curve you don't have to reach that far back with your hand and your shoulder will be in a much more comfortable position. 

Why Collapsible?

Everything is better collapsible. 

It can reach about 52cm, while printable on the mini under 18cm. 

Print instructions:

NO supports, NO Brim, 1 part fully print in place. 

Printed in PLA, but I can't think of any reason why other materials won't work. 

The main body of the model is 4 walls thick (1.67 mm), so perimeter and infill settings only matter for the inner part. I used pretty standard 3 perimeter 15% cubic. 

Make sure your bed adhesion is ok, I had no problems but the area on the bed is quite small.