What exactly can’t you “sync”......?
Take a look at this thread:
https://www.scr950forum.com/forum/1...iscussion/4516-pros-cons-bolt-koso-meter.html
One of my posts on it also include a link to the Koso thread on the Bolt forum - there’s a lot more users on there, and most of the problems have been trouble-shooted (is that a word?! Trouble-shot?!)
As for the YouTubes videos - yes the text is in Japanese, but they’re quite intuitive and easy to follow, I found. The instructions on the Koso website are a little better than what came in the box too.
Keep “plugin” away.......(geddit?!)
Ben