I started building our Motocross Track on the farm 40 years ago with a Cat D3 with a PAT blade,it has been improved over the years with various pieces of Gear from bobcats through to excavators.The last big change occurred when we cleaned out the 4acre dam in the middle of it,with the longreach Cat excavator,operated by another bike nut,and used all of the silt to build the track up.We can now catch yellow belly between "races".
However my favourite and most versatile earthmover is the 1960,Wabco D-Pull/Hancock Scraper which we bought as a wreck and rebuilt in 1983,powered by a GM4-71 with electric steering and
elevators,it was way ahead of its time.The Wabco can do the jobs of multiple machines,digging,carrying,levelling,compacting,and is especially good at building jumps.
Checkout "Vimeo.com/27394481",there is some footage from the 2011 Trailride,which went around the track,with plenty of older XR's and TT's in action.
I like building tracks as much as riding them,and was interested if anyone else had vintage gear they still used,or tips,eg using the silt out of the dam,as it is great for holding moisture and following rain,is the best surface to ride on.