That is a nice box Matwellli and I love the back pack idea. Would be cool to show up on a job on my harley with the quad in a back pack. For sure could save some money in gas ;-)
I have not built a box for my quad yet, but will do so in the future unless I find a good one I can just buy. I was going to use plywood like Bartman used but realized it was too heavy after cutting the pieces. Instead went with some thin birch plywood.
Over the holidays I designed and built one for my helicopter with my dad. Having a box is a great idea for a few reasons. Being able to have everything in your box will help you help to not forget things when you go fly and plus I think good for storage. Here are a few photos from the box we just made. Notice I put some handles on the end so I can use a strap. I just throw the strap over the shoulder and frees up my hands to carry a few other things like my camera and tri pod I use on the ground.