Hands down Rotopax. Here is my nephews https://tw200forum.com/forum/attachme...te-rotopax.jpg
Can't seem to find a picture of mine mounted without a plate straight to the tube rack. Fuel Cans : Gas Pack : Gasoline Containers : RotopaX.com
Rotopax mounting is billet aluminum, unlike the Kolpin which is plastic. However the Kolpin is less expensive. I have seen Kolpin mounts fail on quads.