Hello all, i have a redstone that was given to me out of deep storage from owner that has and is involved with large American iron that requires group participation, excavations,riggers and time. We tore this apart 10 or so years ago  to look for sand and deficiencies. Found little to cry about and made a feww adjustments, i fabricated the  eng shieve and he fabricated the base. Recently we lost the power on li ny for afew long days. The unit sat in back of e250 van and ran continuously off a 12gal gas caddy. Runs1300 rpm or so to make 60 cycle with 4k Stanford head.the house cooks,heats and drys close on street gas. Just noisy enough to get neighbor to fence with extension cord in hand. Plenty of bungee cords used to quiet the open van doors. The town was buzzing with 3600 rpm sets of all sizes and vintages. The worst had to be the aluminum flatheads.the new ohv models don't have that self destructing sound to them. VistaMKDH