I've got the arms for my Kappa box but haven't mounted them yet (they came with it). I don't really like the look of the arms sticking out the way they do. Years ago I had a top box stolen by someone who kicked it off of the mounting plate (don't you love it when people witness it but don't stop it?). Since then I haven't been a fan of removable cases. I'm considering removing the mounting plate, getting a 3/4" thick white cutting board, drilling through the case/board/rack - then bolting it together. I've used a poly cutting board to support a large basket on a DR650 and was really happy with it.
I wonder if you could remove the Shad mounting box, transfer it's hardware to a cutting board, and firm it up that way?
Does anyone really remove their topbox and take it with them anyway?