machinisttx
Addicted to ArboristSite
The 610 and 650 had thick rings in the early years and both were built with thin rings in the later years.
BTW, the 600 series started in 1978 and lasted until they went out if business
Reading it again, I didn't word my question earlier very clearly. If I'm reading everything correctly, the pistons are fully interchangeable between jugs?