Hey Dabid, get off your ass and do it :) I'd love to hear how that goes. Throw some oversize tyres on and tell me how it works - save me spending big $$$ to test myself :) Only joking mate.
I've only had a Lehner Basic 5300, non XL. Bad experience with that in my truck, felt very lacking in torque, like my 380 9s. Eventually sold it because my 540 6s was more powerful in my truck.