I did try that but the top was quite badly pitted and the suction cup thing wouldn't stick to it making it ineffective. I was beat from lapping the first 7 valves and called it quits at that point. I may try to tack weld a bolt to the valve so I can chuck it into cordless drill and have at it that way. I did see 45* grinding stone but not sure if this would damage seat to the point of ruining it and forcing me to pull the motor. Would need .3145 mandrel I suppose but not sure if it is prudent considering I am trying to avoid engine take out and haul out. Any thoughts from machinist types appreciated. Thanks
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