Hi, i just bought a Small Stone nano and there is this label says “kyoritsu Corporation”. The manual is written in japanese. Is there any particular differences between mine with the other regular Small Stone nano? I also want to ask that when I set the rate to 4, the phase shiffter effect kind of gone for a moment. I did not encounter this kind of “Issue” with mu bad stone before I trade it with this Small stone. Did I make a poor choice by trading the bad stone with the small stone? Thank you.