I'm wondering if the nano small stone is really true bypass. If I turn the volume on my amp loud enough, I can hear it swooshing the background noise, and if I adjust the rate on the pedal it controls the rate of the swoosh. This is with the pedal off.

If it's not, would it be possible to do a true bypass mod to this pedal? Just wondering how much space that would take up, it's a tiny pedal.
I've no idea if it really is TB (I had one), but the best option is to use the pedal through you fx loop if you have one, which is what I used to do and had no problems.

If it's not TB, then a mod should be easy enough. As far as I know it would just involve swapping the switch for a TB one.