Cheers, too fast!
I deleted my message as I missed the photo in the first posts webpage link (the .ru page) which showed where to cut
![Embarrassed :-[](https://www.eevblog.com/forum/Smileys/default/xembarrassed.gif.pagespeed.ic.zcm3EmNu9T.png)
At least it's now here for anyone else searching in the future
Edit: Replaced varistor with a TVR14681 scavenged from something else, cut the track about 5mm wide and it charges without complaint on 230v.