Hi Roger,
I am on the Facebook group, but Ian has just changed to the 630 which has the same Knott chassis. Still, you’re right,, it would be worth checking with him to see if he’s experienced anything similar and ask for some photos.
I’d like to fix it before we set off for the Scottish meet, which is the obvious time to pop into ALV. I don’t expect it to be a big issue and if it needs fettling to improve it that’s not an issue for me.
Great call, thanks.