Mine is a Jr. with the narrower Nalpak removable top shelf. Some dirt paths are ok with the small front smart wheels, as long as you go big wheels first (ie pushing from the handlebars). You can put a shelf with a lip on the bottom too, or stick with the narrow, lighter deck and just run bungees down the sides to keep cases from falling off the lower shelf. At one point I had a 2nd Magliner Jr tricked out as a sound cart, with the wider top shelf with a lot of permanently attached stuff (mixer+recorder, power distro, undershelf for a USB interface/drives etc, Phaserite, BST75, DVD drive etc etc ) with pneumatic rears. It worked very well but was heavy enough that it needed to be ramped into a van. Eventually that was just too much and I slimmed everything down to the smaller simpler Mag Jr.