RafikiYourFriendYes, you can interchange the cables in case the provided cable breaks or if you like the no wire bluetooth action like me. Just search ebay KZ ZST for replacements or bluetooth adapters. Hope this helps
RafikiYourFriendI got the 0.75mm and it works great, guess I got lucky because I didn't know there were multiple sizes. Honestly, 0.03mm is really small so realistically both would probably fit, if not, one swipe with a metal file would make it fit.