Bike hitch for back of 5er

I recently picked up a fat tire electric bicycle and went looking for the best hitch carrier I could find for it. Bought one but on my first trip with it I almost lost the bicycle. I think the bouncing, which wasn't all that noticable, did the thing in. I went to Northern Tool and found a lightweight hitch mounted small motorcycle carrier. I bought it and cut it down to the size of my fat tire bike and made a small modification to carry a second bicycle - if my GF ever joins me on a camping trip again and insists on me taking her bicycle. This new carrier may still bounce a little, but nothing is coming off that thing!