I recently purchased these tracks for my 863. They work great, but I don't know who makes them! They are cast iron and very heavy. I doubt they are Loegering or Grouser. If you can help ID them that would be great. Thanks! (hope the pics post ok) http://s288.photobucket.com/albums/ll175/marktomcho/?action=view¤t=tracks002.jpg http://s288.photobucket.com/albums/ll175/marktomcho/?action=view¤t=bobcattracks003.jpg