THANK YOU!!!
The neck on my Yamaha BB615 has a front bow...because I'd let the truss rod off. I'd hoped that this would straighten the neck.
I realise now after reading your post that it needed tightening!! 😖😖
I've taken up most of the tension and the relief in the neck is much better.
I'll have a look tomorrow after the neck has had time to settle and readjust it.
Again, thank you. 👏👏