>I could, eventually, fine-tune these crafts to the point where I am an expert and could do everything completely undetected.

You'd LIKE TO *THINK* THAT, WOULDN'T YOU?***

> I wonder what effects it could have on my body, though.

Assuming that you were able to "move through paused time" without any ill effects, and assuming that the knowledge that there are two or three of yourself going about your business at the same time didn't cause you any psychological or mental harm, it would depend on how often you used it. The more you used the ability to pause time, the faster you would appear to age in relation to "normal" people. You might end up old and grey while your parents are still in their thirties or forties. Bummer.

Grishny

***a Princess Bride reference.