 So, my job when I came there was to convert over to a truck and shovel operation to move the overburden and get the major mining equipment down on top of oil sands and then start moving overburden in advance of the mining process. And we had such a volume of material to move that you had to really go to the biggest equipment available. There was a lot of controversy around whether we could make the big trucks work in the oil sands because of the soft ground conditions. And the first player in the business, Great Canadian Oil Sands, which eventually became SunCore, had gone to bigger trucks and then they had lots of problems and so they went back down to a 85 ton truck. So when I came to Syncrude I really, I had to select the equipment, hire the people, get the whole operation up and running. And I chose the 170 ton electric drive trucks and there was a lot of controversy around whether we could make that work or not. That was in 1979. But I'd known the truck quite well because we had the original ones actually at IOC in Labrador City. They were a 150 ton truck then and they pushed the capacity up to 170 and I also had them in grand cash on the coal business and I knew the truck had the attributes that were necessary for this oil sand application, which was really soft ground conditions and high rolling resistance and so on. And we worked with a manufacturer to get a propulsion system on them that was similar to the application that they had in the railroad side, which allowed the wheel motors to, traction motors actually to work in series and then series parallel and parallel. So that all was part of that equipment selection. So that was a big career risk in some ways because it could have not worked very well at all. And it did? It did, it worked out very well and in fact it eventually led to the whole industry we switched over to trucks and shovels on the front end of the operation.