This is what I normally do with some engines I like to run a bit faster:



On the closing side just removing some tenths of a mm to close it later and sharpening from the inside so it cuts the flow nicely. This will make the engine better in accelerating and will run a few more rpm's. If you go to far the engine will be very tricky to adjust om the low speed needle and can not have a rich setting. Going to far means you have to take away more than 1 or 2mm on a already fast motor

Also very nice information about 2-stroke, some people say this is the 2-stroke bible.
http://edj.net/2stroke/jennings/