Pretty sure they are in Ky unless they have moved.They have always answered phone calls immediately and informatively. The are on the East coast and have normal working hours - no weekends.
The clamp-on style fits all Cat 1 (or the Cat 2 model) tractors.
You can make your own spacer or buy one from them. It works and is quite necessary if you have turnbuckles.
I'm in New England; waited for a mild day to attach my 'quick hitch'; took about 35 minutes ! All instructions were written by a true mechanic, and made the step-by-step job work just perfectly. I am very happy that an American mechanic produced this product. It goes on quickly, and it works great. I have 3 attachments, and I will make spreader bars for each one (of course, all different widths!).
Thanks Pat for a great tool!
from Bill