I got tired of looking for one big box, so I just ordered 2 of these for the Reaper Quad. I was tempted to get one black and one yellow! But was worried the yellow wouldn't match quads graphics lol. Hopping I can mount them sideways in new rack, and have the nearly 5x10" of open space between them for what ever. There specked at "Outside Dimensions 10.19 x 8.55 x 6.80" So I will see if I can make that .19 fit in. I believe blk84 said he had to shave his slightly to make it fit. I know they will fit long ways since rack is 21x10". Although it would be nice to have them fit the other way, I will see soon enough. And it's crazy how 5 1/2 years ago blk84 paid $60 for one box. And today with Rastled's link I purchase 2 for just under $63.00 shipped!