Close-up of the dropout/wood interface possible? Not sure what you did there.

I have an old Al Cannondale frame I got which was broken. I did about the same thing, but didn't make the back end long enough. Need to rework that part.

I make chimes, and have long wanted to do one from frame tubes.

And a clever one at that! I've seen variations on this theme before. Is it more stable configured backward like that? I've got a few Comb Company Lamberts I plan to use in a similar way.

Hmmm... I have my "retired" frame hanging on the fence in the alley awaiting the metal scrappers. Maybe I should retrieve it and finish cutting it into pieces. I presume the key is to get the lengths right so the notes are pleasing?

Stamped dropouts, just bent them out 90 degrees and screwed into the wood through the rack eyelets.

Yep

Indeed, plus the creativity in mounting them. My plans were to hang the tubes by shifter cables from a chainring, maybe use a cog for a striker, and maybe something like an old piece of saddle leather for a sail.

I'm giving away all my ideas but I don't have the time or the tubes.

Here's my main reference, all you will ever need to know.DIY Tubular-Bell Chimes "Say It With Chimes"

Brilliant! First I just need to finish all those other bike projects...

Regarding the chimes, for purity of the sound, be aware that it's going to be difficult to get them just right. Brazed-on cable guides, shifter bosses, bottle mounts, etc. will alter the tonal quality. So will butted tubing.

Cosmetically, the striker (if a cog) will beat the tar out of them. And they'll rust.

On second thought, to hell with all that. They'll be so freaking cool it won't matter.