Hello! I am the happy owner of KZ ZS3 + Bluetooth module but I'm looking for spare earphones which I may need when those will be lost/broken. I like KZ ZS3 but looking for something maybe a bit better/comparable but sounding maybe a little different. Can't find so many opinions about ZST Pro though. I also bought ZS6 but I am forced to sell them because they are too big for my ear canals. How about ZST Pro? Are they small like ZS3 or big like ZS6? I'm going to buy KZ ZST Pro bluetooth module so would be nice to hear also how they sound with it! ZS3 sounds nice with bluetooth IMO. Thanks for all the opinions!