Browsing over the up coming farm auctions out my way.....I notice a lot of the tandem axle grain trucks have tag axles..some have lifts..some have brakes ( on the tag axle.), seems like some have neither.??? Any pros/cons about buying a truck with tag axle over full tandem.? Bearing in mind this is not off road truck, but for solid gravel roads and/or highways, for hauling irrigation water to remote sites. I realize there is the maintenance issues...but I am speaking of operational ones.. Any thoughts.