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I have been using a Dyna-King Professional since they came out. I also have the midge jaws. With my 2 sets of jawsI have tied many, many, flies from 3/0 saltwatwer (the largest I use) down to a 30 (just to see if I could) the smallest I have ever fished has been a 24.
I also tie using a 720 Vise that I like extremely well for sizes 14 to 22. This is a well made vice and has many useful features.