T&C cup wheel dressing

[Mcgyver]

I've picked up a bench top T&C grinder with an air spindle to attack the bins of dull end mills! I haven't T&C experience, but with some texts, patience and logic have been able make a reasonable job of sharpening some end mills.

I'd like some advice and help though on balance/truing the wheel. it was a cheapy (triumph) 5" cup that was WAY off when I bought it. To true it I held a diamond in the spindle and did the end of the cup, then approximated the angle and did the outside of the cup. That leaves the inside of the cup and the area under the blotters potentially untrue. Would a better quality wheel be pre-balanced and the stick/diamond only need to clean the wheel?

You can almost not tell when the motor is on without a wheel, whereas now there is definite vibration, more pronounced at certain speeds as it powers up and down. you can see tiny patterns in the grind suggested its out of balance.

The text I read said to true it up with a stick. not sure how to do this, the stick just seemed to vibrate as it was held against the wheel, send a bunch of grit everywhere but not produce a concentric, round wheel.

So yea brethren with T&C experience, what does one do to prepare a cup wheel for use on a T&C grinder???

thanks