I can do quite a bit of testing myself. I have the following radios available: BTech UV-2501, UV-2501+220, UV-5001, WACCOM MINI-8900, LUITON LT-588UV, BTech UV-25X2, UV-25X4, UV-50X2, GMRS-50X1, QYT KT-8R and an Anysecu WP-9900 that I am currently working on. I am also able to test with Windows, Linux and macOS (if I have to).
I'm starting to gather that your shack (or garage or storage unit or living room) looks like mine :)
I have also had John LaMartina (the webmaster of the miklor.com website) assist with the testing of the previous batch that just got merged.
What would be your recommendation for expanding testing to a wider group of radio owners?
Well, I'll leave it up to you about whether or not it's necessary. If you've got a bunch of radios and a bunch of platforms, maybe that's enough. Plus, if the change makes sense (which it does) then that's another point in favor. You could always solicit the chirp_users list for people that have that radio and point them at a bug with a module attached and instructions. But, I can understand if you think that might be a can of worms. The only thing that you're not covering with your list above is various slow computers on every windows version, every USB chip in the world, varying cosmic rays from different parts of the planet, etc.
But really, I'll leave it to you to decide on confidence level.
I changed the sleep(0.002) to sleep(0.1) this morning. So far I have encountered no issues with any testing that I have done since making that change.
Cool, I think that's better.
As always, thanks Jim!
--Dan