John,
From the last reply, I didn't understand if you have your solution or not... Did you try the function I wrote... I will to whatever precision going out that you need. That is what the 3 parameters are for...

Original number, Precision increment value (.002, .000006, .25, .7, whatever), and the length of precision ie: .002 = 3 decimals...

The function is generic enough to handle multiple calls in case you have a variety of controls that require different precision factors.