Pick up a bunch of small clamps. C-clamps are cheap and work well. You'll also want some scrap wood so you're not clamping down directly on the shell since the hard steel of a clamp can easily leave dents or imprints. Shell scrap works well, but even something like popsicle sticks can do the trick and those can be found at just about any craft store.

Before using a drop of glue, try clamping the ring in place. Start exactly opposite the ring seam and place a clamp every few inches, one at a time, working back toward the ring seam. This should force the ring to follow the shell's full circumference and you may find that the ring does fit, albeit tightly, which is a good thing.

Once you've gotten the ring to fit, glue it and clamp into place. I've had good luck with either Titebond II or Titebond III wood glue. There are plenty of others out there that work well, too.

As for the rusted parts, my suggestion is to pick up some Evapo-Rust. If you've got an AutoZone or Harbor Freight store nearby, they probably stock it. The stuff works really well. Soak the parts overnight and the rust is gone. It's really that easy.

First, get it dry. Might take a couple weeks. Once its dry the wood should shrink enough to fit. Then, glue it.

Before you start any kind of drying process, deal with the mold. And you are better off using air to dry than heat.

A great glue to use for that would be Gorrilla glue. It is polyurethane. You dampen one side of the wood you are gluing with water, and you apply a very thin layer to the other piece of wood. Then apply your clamps like skydog says. Polyurethane will expand a bit as it dries and will show some "foam" as it squeezes out. Just cut off the excess foam with a sharp knife. Polyurethane glue holds forever. I have use it on many reinforcement rings on drums I build and they have never let go yet.

Thanks so much for the info. Regarding the removal of the mold; is there any suggestions as to how to go about that? I've wiped off all the visual parts but there's some discoloration of the wood and I'm sure mold is still embedded.

I wanted to remove the tone control. Are there any suggestions as to how to go about that? The screw attached to the knob is pretty rusted and I don't want to strip it to the point where I can't get it back on again.

Is the Evapo-Rust safe to use on the chrome of the lug casings, hoops, and strainer?

4 of the lug casings are damaged in the screw holes that attach the lugs to the shell. I think if the screws are lubed enough they won't cause much more damage and should hold. Are casings hard to come by and/or expensive? Is it worth it to look into getting replacements?

Thanks so much for all the valuable info! I appreciate it.

C