No worries about it being Sunday...
Look at your meter. You're trying to measure 10-15KΩ on the 2K scale. You always pick a scale large enough for the job. When in doubt, bump the scale up to see if you get a reading.
If that's the original coil, it wouldn't hurt to replace it with a Honda MP08 coil.... a used one off Ebay and not the Chinese repops out there. In a bit of irony, exactly the coil your Gold Wing has... 'cept it has 2 of 'em. They're great coils. I run one in my '80SG. Might be the cause of your problem, but there's another...
Another thing the Mikes Chinese rotor you have has a known issue for is messing with the TCI. And your symptoms of stumbling at low rev's are similar. It's an easy one to troubleshoot.
1. take a quick ride around the block to verify you still have the symptoms.
2. Make sure the battery has a good charge.
3. Disconnect the reg/rec.
4. Take her for a spin and see if that fixes the problem.
5. Let us know if there's any change.
If that doesn't turn up anything, I'd try a fresh set of plugs next... and replace the caps, but we'll cross that bridge when we get there... there's some snakes to look for.
Nice early Gold Wing!! I think they make for a good cafe project.