Now that my curosity (sp) has gotten the better of me....I tried to check it out a bit more and from what I can tell there are 3 Juki Exceed & Quilt Pro machines....HZL and then numbers.....so maybe this is the issue with the throat space. Don't have time to check them all out and maybe the one I chose was one of different dimensions but there are 3 of these machines out there. They do all start with HZL and then a number. Hope this helps.