Hi again. I haven’t done the staining part of this project yet. I won’t be attempting to hide the repair very much at all, just to enhance the aesthetics of the general area. I haven’t gone down to bare wood. I do not expect the CA in the repair to accept stain very well at all, but it’s ok with me. I have even been considering treating the area with a Kintsubi (gold leaf) effect on the whole crack as it has a good shape to it. I wonder whether that’s a thing. Undecided.
Yours is a more valuable instrument and you’ll need to do tests on scrap wood. Probably best not to sand back any further on the actual neck.