A insert to add 2 cupholders, a small bin to the side and 2 spots to push the ends of your USB C cables into when not using them (Or in my case, the little adapter plug to use with my phone holder in my car).

The 3MF has the print in the correct orientation. Other files still need to be oriented.

The print was designed to be printed on the 45 degree chamfer on the bottom back of the cupholder. It only needs a small amount of tree supports to hold up the wider top at the lowest edge.

I've published the design I am currently using, and won't edit it since I'm not going to print an entirely new one to test the changes. However you might want to incorperate some of these changes yourself:

• The design still has a tiny bit of a rock forward and back. I think the bottom might not be quite touching at the bottom of the original cupholder. Making the design 2-3 mm taller might fix this.

• The front cupholder is a bit of a compromise, being the same diameter as the back one, it won't be amazing at holding things like the slim coke cans. However making it any smaller it won't fit cups from McDonalds for example. If you want to only put smaller cups in, you might want to make it smaller to improve stability.

• The front cupholder does sit in a bit of an annoying position for using the shifter. You might prefer just having a larger square storage compartment there instead.