syncro ring will be the problem, the forks and selector sleaves all operate 2gears each, so if its only one thats grinding then it has to be the syncro(baulk)ring or the syncro leading edge of the gear itself.
Dealer fixing it? :cheese: Your brave/ have deep pockets/ want another mortgage? I think it will likely cost a few hundred especially when they recommend selector forks/selector rods/ inner syncro ring/ outer hubs on the first 1st, 2nd and 3rd. I'd probably just find another box. I'd get some sort of estimate first. Just remember though, an estimate is just that, not a quote!
No not yet, but by the end of the week. Its a specialist Ive been using for a few years, and always treated me well with the Cloverleaf so Im not expecting anything different. Dont worry I gave up on the authorised network some years ago, which is a shame.