Hi, wondering if anyone can help, i have just purchased a fiat doblo wheelchair adapted vehicle to enable my daughter to travel in her wheelchair......it has a lowered floor and because of this the fuel tank has been moved to below the vehicle......i would like to fit a towbar to the doblo to enable us to tow our caravan.....i guess i would have to use a detachable towball to enable the ramp to drop, just wondering if anyone has ever done this or has anyone any ideas on how to....regards julie