Would a fine grinding stone in a Dremel be appropriate for grinding the exhaust port?

There seems to be allot of emphasis on changing the timing. What about port area? In the process of trying to educate myself, I have done some reading (much of which, is over my head) of some well known texts that says, port area is also a significant consideration in improving 2 stoke engine performance. My Homie's exhaust port appears to taper in on the sides as it goes to the cyl. leaving room for expansion at the sides. The texts I read said, a port can be up to 50% of the width of the bore Dia. Going that wide isn't my goal but straitening out the sides I may concider, if that has been found to be of benefit without consequence.

One thing I do know about engines is: You can't put a double quad, tunnel ram intake on a stock V8 engine and expect great performance. I have seen others do it though. Mis matched parts definitely can lead to disappointment.