toolman946 via CraftKB.com wrote:
I'm assuming from your descriptions that the door is composed of stiles
(vertical components), rails (horizontal components) and panels.

Nope, it's a flat slab, presumably of glued-up boards, although people
who have owned the house for the last 90 years have put so many coats of
finish on the door, it's hard to tell.

At present, the crack on the inside of the door is barely noticable and
I'd like to keep it that way. I have tried to flex the door along the
outside crack to see if I could get a syringe of glue into it, but it's
still too tight and I'm afraid of breaking the inner face if I do. I
wouldn't get much glue coverage that way anyhow and if I end up cutting
apart the door with a circular saw (which will give me flat glue up
surfaces), I'll add internal reinforcement with dowels or a spline or
something.

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