Mt night last you footprint, though there still a lot of digging to go yet. Thanx for your interest. 
Farm work is pretty scarce this time of yr Tom, though I spent a few hrs earlier in the week loading trks - vacc'ing bin bottoms... what's really satisfying is having rc equipment that not only works, but can do what I want it to. 
 
Quick vid showing the exit into basement & continuing to cut a straight wall, dirt is quite a bit dryer, harder to dig, but the 850 is getting 'er done! 
https://youtu.be/mn5T2uG4Xsw