Yeah , the bottom of the bigger bit hole looks more like "rock bottom" :<0)
Here are a few I have out. 3/8" will just cover the bottom of a knot. Those knots are 22mm to 18mm but you can see the new glue is about the same depth.
In the handles you can see all the epoxy out.
Those look great. Not to be a defeatist, but I am startin to think on ditching this and buying cheap Omega!! Lol