So, Machine Grade Control. What's that all about? Okay. So, applying a range of technologies to heavy earth moving equipment to either indicate or automate the control of the work tools. I think the blade on a bulldozer or the bucket on an excavator, relative to a predetermined surface or design. So, you want to build or ride in a certain height, in a certain location, to be certain worth, with certain slope, so the water falls off. All that stuff's done in the design phase. We make the systems that will help the operator either, indicate where I should cut dirt or put dirt or we will actually automate the machine to do that for them. Yeah. So, our systems tell you where to put the blade or the bucket, all of that for you, relative to the design. So, you'll see some of that when we get this system going later on. You guys are going to help make this all work and put it all together. So, for those from an mechanical engineering. We know about mechanical engineering. Think about it like a CNC machining center cutting metal, except we're doing it to the earth with machines with this type of equipment and this technology. So, one of the benefits. So, if you now apply this machine control technology to a machine, why would you want to be doing at site? This is like a productivity study that was done back in 2006. It was a two road jobs that were identical next to each other. So, think about just a farm pedic and we're just going to do a productivity study and build two identical bits of road, one in a conventional scenes. So, just with conventional technology and one with this automated grade control technology. So, we going to be looking for which systems overall from a productivity perspective is better? Which one is better for machine utilization? So, I think hours and maintenance on that machine, fuel consumption, the number of people on the site, and then ultimately, you want to measure the design quality. So, how accurate is that road that we built? So, we're going to go and I'll give you some examples here of all of those pieces coming together. So, what they did is got one team and then divide it into two pieces. So, the two identical road designs, like I said, same profile, so the same horizontal shape, got curves, got elevation changes. So, in the Z-axis, super elevated corners and identical cut and fill. So, the machines are going to be moving the identical amount of dirt in terms of digging dirt up or putting dirt down in the same equipment. So, we've got a bulldozer D6N, a pretty sizable excavator, 330D excavator, and then a 14-foot mold board motor grader. So, let's just starts giving you a taste for it. So, you've got do some site set up. Conventional it took seven and a half hours, with the technology in this case called AccuGrade, 54 minutes. Operating time on the D6N two hours, 24, to the work now 28 with the technology. The excavator five hours was cut down to four and a half hours. This was an indicate system, these days which is what the system here, is this new system where she automate that machine now. The motorgrader are now 50 down to 32 minutes. So, you can see total time for the work to be done in a conventional seems 24 hours, with the technology 11 hours or 12 hours. They're cutting it in half, [inaudible] 100 percent productivity gain, like that by putting the technology on the machine. So, productivity study. Increase in productivity three days down to one and half days, total when you summed up everything. So, there was less waiting time. The machines could actually do longer passes in terms of how much they could push in one pass versus just doing short little bits, 43 percent less fuel. It's pretty phenomenal number when you think about it. One of the biggest expenses for any construction site is fuel. The other one would be rework or going back and having to do something again because you've got it wrong the first time. I think about the fuel savings for some straightaway, 43 percent. Someone told you a car could get 43 percent fuel savings by just adding some technology. I'm pretty sure we would all be there doing it. Obviously, yeah, if you've done things quicker, less time and half the time, at least we're on the machines. See your service and costs are going drop down as well. So, this is just shows the layout you can say the shape of it. This is looking down on the design. What you're looking for here is green is good, red would be bad, and blue would be bad. One's high, one's low. So, this is basically the vertical accuracy. So, you can see in the conventional one, a lot of red, a lot of blue. So, the guys who are doing it by eye effectively. Whereas on the right-hand side, only one red dot. One spot where the technology was off grade. So, 45 percent in tolerance, 98 percent in tolerance with the technology. So, you sudden now your accuracy, you're not going to have to back to rework. These guys would have to go back and rework that to try and get it in grade. This was just the dirt. Think about moving all that dirt and if you cut the dirt too low, and then you're going to put concrete or asphalt on top of that, you're going to need more concrete or more asphalt and that stuff's expensive. So, if you've gone back and you bid the job, your profit margin might instantly evaporate because you had to spend a whole bunch more on the asphalt, whereas this guy had the job and he had the technology. He's on grade. He's going to hit the yield, which is what the term is for that. So, it's going to make the money that he's planned to make.