Tuned Mass Damper, Home made fun

Don't worry too much about getting the weight and spring rate perfectly correct, remember when you purchase a mass produced one, they have no idea of your riding speed or sprung vs un-sprung mass. At the end of the day adding mass to your sprung mass makes the suspension work better, don't believe me, go take an e-bike down a mountain. TMD purchase list 397g system weight 210g for the brass Aluminum plate - https://www.mcmaster.com/products/897... Brass Rod - https://www.mcmaster.com/products/895... Counter Sink bit set - https://www.amazon.com/Countersink-Co... Coupling nut - https://www.mcmaster.com/products/900... Flanged Sleeve Bearing - https://www.harfington.com/products/p... 1 7/8 hole saw - https://www.amazon.com/Lenox-Hole-Saw... M8 Flat Head - https://www.mcmaster.com/catalog/9126... M8 Jam Nut - https://www.mcmaster.com/catalog/9037... M8x1.25 Socket Head Cap Screw240mm - https://www.mcmaster.com/catalog/9129... 8mm washers - https://www.mcmaster.com/catalog/9868... spring rate 97lbs(6) - https://www.mcmaster.com/9657K395/