Minor concerns regarding SuperDuper

[giba]

First of all, I'm a new registered user of SuperDuper, and so far I'm impressed by the quality of this great application. I do, however, have three minor concerns regarding using SuperDuper on a daily basis.

1) For the current and all future versions of SuperDuper, will SuperDuper modify the source volume in any way during a backup or smart update operation and therefore putting it at risk for corruption?

2) After I quit the SuperDuper application, does SuperDuper continue to run in the background in order to support features like SmartUpdate or SafetyClone? Or does it install any system-level hacks to support its operation?

3) Is it recommended to do a "erase and backup" once in a while after several Smart Updates?

Thanks,
Eric