I've created this keychain as a gift for a friend. This eye-catching var was her very first vehicle and is gone long ago.
Up to now I had not chance to print this model, but Slic3r seems to be pleased with the STL-file.
The design is intended to switch the color of the filament after printing up to a height of 3mm.
As soon as I'm back at my printer, I'll print the first layers with black PLA and use red PLA for the rest of the keychain.
Update: I finally printed to with color changes after 2 and 3 mm. Came out OK. I think, I'll leave it that way.
I'll print it on thursday using black and red PLA with a color change after 3mm.