Interesting accessory.
Here's a Lister CS with a bolt-on hopper attached to the cooling jacket inspection plate.
http://www.youtube.com/watch?v=nBLyjcx3bpo&feature=mfu_in_order&list=UL (http://www.youtube.com/watch?v=nBLyjcx3bpo&feature=mfu_in_order&list=UL)
veggie