RC Crawler trail marker
thingiverse
I haven't printed one out yet, but I thought I'd show you what I came up with.
Download Model from thingiverse
With this file you will be able to print RC Crawler trail marker with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on RC Crawler trail marker.