Originally Posted by Jesse Cloud
If the loose tenon is the only structural problem, I would mask off the surrounding area and get some epoxy into that mortise. Getting the epoxy in there could be tricky. I'd get one of those double syringe epoxy applicators, bore a couple of small unseen holes (on the inside of the base). Bore right through the tenon, put the syringe tip tightly into hole #1 and squeeze as much epoxy in there as you can. If you get some epoxy exiting through hole #2 then you know you're good. Even if you don't see it coming back out, you'll have filled up enough of the voids to solidify the joint.
As to the general fit and finish, give your younger less experienced self a break! It was the best you could do at the time. Remember that it was only the gunk in the bottom of the drawer that drew your attention to the minute details. Let it be - go on to new and better projects.
All the best,
**Now holding auditions for a catchy new signature**