Thread: Limits of gap filling with titebond II for repairing harp neck/pillar join

Irish harp had a great fall and neck pillar joint came adrift. Previously joined with five dowels and titebond II. It had over the years separated a bit (the strings pull down on one side at around tonne of pressure) but it was stable until the crash. Titebond II made it relatively easy to separate the two pieces.
Decided to put in a mortise and tenon, which I'm currently just fitting now. I glued the tenon into the top mortise with marine epoxy but the joint and other tenon down into the pillar I wish to do with titebond II again. Is this gap too big? I don't have feeler gauges but I'm estimating it's about 0.1-0.2mm and flush across most of it.

harp neck joint.jpg
I'm using hand tools and being a part-time woodworker don't want to cut away too much if I'm hit/miss with cleaning the joint because it can change the angle of the strings. I did build this 25 years ago (and other instruments) and it all works beautifully but I get there through patience rather than having the skills of those who spend years mastering them.
My options:
1. It's ok.
2. It's not ok, you're being lazy and kidding yourself, so continue to clean it up for tighter joint.
3. Use marine epoxy (but with associated challenges if it every needs separation).
Yes, I do know titebond is not good for gap-filling. Just wanting to understand how much is too much.