RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
At the local tractor auction co, there are large rough terain forklifts, and each has a ballast plate on the rear. on that plate are stacks of rear wheel weights from various machines. Works pretty good too... scrap metal put to good use!