1993 NH 2120 (the best), 1974 MF 135 (sold, but solid), 1947 Farmall A (bought, sold, bought back, sold again), 1956 MH50 lbt (sold, in 1980, darn it)
JD5210 I admire your bolt maintenance but you'd get better service from a rust preventative rather then WD. I use wheel bearing grease from an ancient tub I have and it lasts a long time inside a nut.
Jim