I'd just touch up the 'cracks' with CA, let it dry, and then sand the glue down with the rest. I would not worry about where the blade is pressing the horn since it is not cracking. It's going to contact that area in the future too. It seems as though the blade had been kept closed too tight with time. Just don't keep it closed as tight and you should be fine

Sand her up as is, and get that mirror polish.

If you are not happy, try Gary's liner trick and work out all those horn details that you are concerned with (i.e. the pressed contact areas). Also, you might want to find someone that can remove those pins and retain the original brass 'bulls-eye' collars if you do take her apart. If done right, it can be re-pinned in the original style, but with thin brass liners.

I'm happy to hear that someone else uses 'Gorilla glue' for slapping together scales with liners! I thought I was the only one.

C utz