Do some reading on Tesla's Semi, that's probably where we're heading with tractors. The only hold up right now is cell production but that's coming maybe this year but probably next. Autonomous driving, half the energy costs vs diesel, far less maintenance, 500 mile range and an 80% recharge in 30 minutes. And that's with today's technology - in 20 years those metrics will seem quaint. It's the real deal and companies from Fedex to Walmart have already placed orders. Of course the market for road vehicles is far bigger so that's where you're going to see the major advances but it will quickly filter down to tractors as well, the only real question is how long it will take. I fully expect that my grandkids generation will view diesel engines the same way people view landlines and typewriters today.