The mouth is adjustable, but doesn`t close up tight enough, the brass lever that adjusts the mouth, my 12 year old son could have filed better & the thread on the front knob that holds the lever is so short it fell off as it was unscrewed.
The thread in the cap that the thumb wheel screws into was so poor & sloppy that the wheel was skewed at an angle when tighten.
The lateral adjuster is locked in position with a grub screw, what a PITA that would be to use, that is, if it lasted more than a few months before it chewed up its mating surface, if indeed it reached it`s mating surface, Andy informing me that the last one he had didn`t
The production quality was so poor, it was laughable, which is exactly what i did whilst viewing it. I wouldn`t have been laughing if i`d have paid for one.