Bob
Please accept my humble apology on the size of the adjustment screw, you are correct it is 1.5mm. But the jam nut on the .20 I have are 5.5mm not 4mm. It turned out I had everything I needed to adjust the valves. I ran the motor today and it runs great. I even called Larry, who has been under the weather for a couple of weeks, and let him hear the engine while it was running.
I was getting 9K on a APC 8x6 and it ran a full tank with no problems. I have to believe that it will only get better as the ring seats in with the cylinder.
To all that helped thanks very much, Bob your help was greatly appreciated and as I said before Frank Bowman was a great help in getting the ring installed.
Andy