Degu - counts-as Centaur

I think I got my first Degu for Christmas in 2011, and almost 3 years to the day later, I'm finally building it (and the 2 I bought last week). These are going to be fitted with a plough, and some infantry seated on the back using Victoria Lamb seated legs, and rolled out for my Blood Pact as Centaur alternatives. I'll be adding some stored rocket reloads on the back for my Thudd Gun/Nebelwerfers and claiming the poor ammo storage location, and propensity for the crew to ride on the top is why the vehicle has the open-topped rule.