I just purchased a used A.K. Best vise for a fantastic price! I don't know much about these vises as they haven't been made for a number of years. Can anyone give me their opinions on this vise, i.e. pro's, con's, how they rate with other vises, quality, functionality, etc? My vise has two screws to hold the third hand, material clip, or whatever it is called, but it didn't come with one. Is it still possible to buy one somewhere? Finally, the vise is in excellent condition - what do you think the value of this vise is? Thanks in advance!