Just the trailer:

thanks E3D for the original design inspiration!! 

Reworked - Cali Tralier: https://www.printables.com/model/258049-the-benchy-cali-trailer

(go give this thing a like)  as well as this competitor for the hitch inspiration) :

https://www.printables.com/model/320875-e3d-cart-for-towing-the-benchy-and-cali-trailer

Holes for typical 2mmx6mm gridfinty magnets. 

**BE CAREFUL WHEN REMOVING FROM BASEPLATE, SKIS ARE FRAGILE)