Thru the years I have tied at many shows. I also know tiers that sit at a vise for hours production tying,one at a show tied 24 hours without stopping. I have found that the height of the vice jaw is the most important item. If your elbows are not at your waist (side)you are always using shoulder and arm muscles. Hands tie flys. To get hands at chest height you can use a Vice Stand Adapter a L shape arm for a c clamp or pedestal that allows the tier to move the vise away from the table and up or down 5 inches. Example --just above the table top chest high. BILL