The bottom parts are held in with a 1/2"bolt. I was a bit uncertain about the strength when I made it so haven't converted the OEM bucket yet as I would need to cut it apart, but haven't had any problems yet. I have done a bit of back blading using the larger bucket but am not yet sure it will stand up to the abuse I give it digging and leveling gravel. There is nothing joining the two adapters on the arms as I didn't want to give up any capacity but the hassle lining things up to install is a very minor nuisance. I can change from the large bucket to the adapter for a jib pole or the forks in about two or three minutes. I have since added a cup to the top of the frame to move my 25' fifth wheel trailer. The bucket is two feet wider than OEM and about 8" taller. Just by luck, it is about the maximum the tractor would handle. My driveway is about 250' long and I was hoping to reduce my plowing time by 25%. Unexpectedly, it cut it in half as there are many less windrows to clean up.