I cannot respond to your exact questions because most of my tying is with the standard jaws and nothing smaller than a size 14, but, I thought you might also want to check out another option from Regal. My Regal was a clamp-on style and I tried it with a base, but, found the vise stem too tall. I figured I could just cut the stem down,but, really did not want too. I saw that they make a Traveler version of the Regal with a weighted base but did not want to own 2 Regal vises. The vise stem on the Traveler is shorter and shaped differently. It looks almost like a "question mark" and I really liked the looks of it. I contacted Regal and asked them if the standard vise head, which is on my clamp-style Regal, would fit on the Traveler stem and if it did, could I just purchase the Traveler stem? They said the standard head would fit and I could purchase the Traveler stem for $35. I did and I love it!! I just thought you might want to check that option out too.