I have. They are just north of me about an hour or so. I went to one of their facilities to check on some grey market machines I was interested in back in 2006. I asked about the Allied brand but they only had one machine there and it was in rough shape. They look an awful lot like the Chinese tractors you see at Norther Tool and such.
Some of their models are pretty big but the only one I saw was about the size of standard compact 30HP machine.