Case 60-hp gas engine with a manual clutch that runs as good as new, a 42"-diameter saw blade with inset hardened-steel teeth, a mandrel, the heavy shaft that holds the saw blade on one end, and a big pulley/flywheel on the other, parts for the feed-works-a battery of gears or pulleys that transfers power from engine to carriage, plus three headstocks that hold logs on the carriage and the set-works that propel the logs forward for cutting.
I set the carriage on its wheels in the middle of the track and mounted the three headstocks on top and the adjustment mechanism (the setworks) along the back.
Shafts, bearings, pulleys, and drums for the mandrel that holds the blade and the steel to make the headstock to hold the logs, plus assorted fittings, wheels, lumber, and rail stock will go for maybe another $250, bringing total cost to under $500.
The EW100 is similar to the EW75 except it has two two-axis headstocks, each with a cross-milling spindle and one or two drilling spindles or tapping spindles.
Headstock longitudinal and cross ways are coated with a anti-friction material to minimize stick-slip.