 And when did you install the first course plug in that? Oh, I can't remember right now It was probably Approximately. Oh, I would say in 1964 Early and you said that was the first in Canada It was the first porous plug in major steel facility and We had out by that time we had a little Research lab at the fast school in the back of the template storage area and we had induction furnace there so we could make small pots of liquid steel and Put small porous blocks in the bottom and bubble our gun up through it and see what that effect would be before we put them in labels of 100 times the amount of steel So and then In the steel making plan And so the porous plugs there from that arm of the fast school and it worked out there's a good Way of stirring more steel Because the important steel on the lathe but quite often it would be segregation things like that segregation of chemistry segregation of temperature Both were critical to the quality of the steel. It was a good Step forward for the fast-goer Though not many young people Anxious to put porous plugs in the bottom of the lathe but people thought well, I'll go my steel Eventually tried one, but somehow they didn't put it in properly and it leaked through and they had a The bottom of the lathe of the steel which that stopped them from making quite a hit