Somehow I thought the bin would be bigger, but as long as it holds 2-3 bags of fertilizer I am happy.  I have a Polaris Sprortsman 570  that I installed a rear brush guard on, so mods were necessary for the install since the guard prevents mounting the plate on on the rear rack.  I had a choice of getting larger U bolts for the 2" brush guard, or drilling...I chose drilling for a more stable, better looking permanent mount for the plate.  I centered the mounting plate on the brush guard using the lowest two holes on the plate, marked and drilled through the brush guard with a 5/16 bit then mounted the plate using two and a half inch grade 8 carriage bolts, nuts, washers and lock washers.  To solve the tipping/leaning issue other reviews commented about when the bin is full of heavy material, I removed the bolts holding the top metal band on the bin and replaced them with 3/8 eye bolts, then used a pair of 6' 400lb-rated ratchet straps hooked through the eye bolts and rear rack to pull tension on the top of the bin (before loading with material) to add extra stability (you can get a pair of them here on Amazon...Keeper 03720 Camouflage...for less than $13).  Trim the strap length for a custom fit then just store them in the bin with the pins used to secure the broadcaster to the mounting plate when off the quad. (By the way, I tried bungee cords first and found that they just did not provide the stability I was looking for, so went with the ratchet straps.)