JANSJÖ lamp mount for 2020 extrusion

This is a clip for an IKEA JANSJÖ lamp for use with 2020 aluminum extrusion, such as the type used on the LulzBot TAZ printers.

The design is an adaptation of an existing design for 8020 extrusion.

I simply kept the same body, and re-sized the back "mushroom" down to fit.

The part is a snug fit when printed in PLA, but should be able to be inserted without need of tools. Seems to be an even tighter fit when printed in ABS, requiring some extra force.