Good morning folks. I'm looking to purchase a Transit and have it converted to 4x4. I'm still early into my research but it seems there are three companies that offer these conversions: Quiggley, Sportsmobile, and QuadVan. It also seems that each of these companies does something a little different with their 4x4 system. I am not very familiar with 4x4 systems (owned a Jeep once but never really got into cars enough to learn ins and outs of the 4x4 system); would anyone mind giving me a breakdown on what differentiates 4x4 conversions from Quiggley, Sportsmobile, and QuadVan? Are there other options out there?