Hi, mdr. We have lots of customers using a Way Excellent II Turntable Mat with HW-19 tables. The HW-19 over the years has had several model variations. Our customers mostly use a 4mm mat with the Delrin and other platters and a 2mm mat with the acrylic platters. With HW-19 models having a spindle washer and clamp; most of our customers have found that you don't really need to use the clamp anymore; some like to use the clamp though--the Way Excellent II mat is fully compatible with a clamp, so it's strictly a matter of personal preference. As with Big Tall Tenderfoot isolation feet to replace both stock and Sorbothane "upgrade" suspension springs, they always get an excellent result with a Way Excellent Mat.
Big Tall Tenderfeet are used as upgrade replacement springs for many models of VPI, Thorens, AR and other turntables; with some, the Big Tall Tenderfeet need a height boost, and with others they do not. For a height boost, some of our customers use a hardwood or plywood square, some use Big Fat Dots. Just about any firm, non-squishy material can be used.
Herbie's Cone/Spike Puckies under the stock cone feet are also beneficial. If your unit has rubber feet, then four regular Tenderfoot isolation feet are a great upgrade replacement.
Steve Herbelin
Herbie's Audio Lab