Inside never bothered me like it does some people, I'm an equal opportunity english abuser...
I used to prefer certain types of english on certain shots, just the way I learned. I would always hit those shots that way unless absolutely necessary to do something different for position. I liked outside on thick - medium cuts, and inside on balls near the rail.
Now I basically try to shoot all shots with center or very close to it in order to eliminate variables like squirt, curver, etc. and maximize my consistency. But I will certainly tweak shots with 1/4 to 1/2 tip as necessary, along with draw/follow or speed, to alter the cueball path to achieve proper routes and position. And since I learned with so much english, I'm not opposed to using more when needed, but that's the key word - when needed.
Like Renfro said, you just need to practice until you are comfortable. It does help to come up with some systematic adjustments for the english, can give you a lot of confidence. Or you do it the old fashioned way and just learn the adjustments for various spin amounts, distances, and speed through practice and repetition. But if you need inside english for position a thin cut, or any other shot, nothing should stop you from being able to execute that properly.
Scott
