I like Grandpa's idea. I caution that even a 6 way blade is NOT a miracle on a dozer. It is only as good as the operator. Smoothing out processed material is easy even with your machine. Smoothing native dirt is near impossible. If it were me I'd place & level the dirt with the loader, then buy or build a back blade for a tractor with gauge wheels. I see land levellers do a nice job, or even a good box blade will smooth things nicely.
I don't have a track loader, but I find I can do better backward with a smooth edge backhoe loader bucket back blading. I do have a dozer, but after shaping the road, smoothing is best done with backing up. My friend owns IH TD7e, he grew up in the seat. He climbs on the seat of my TD7G & lays down a surface smooth as a tennis court. He explains angle the blade a bit so tracks don't both dip into the same dip. Overlap a bit to where you can see the the corner of your blade pass over your last pass.
Every year after the tractor pull he climbs on my dozer, 1/2 hout it is ready for seed. I'd spend three hours, it wouldn't look as good.
