I don't use Tampermonkey (it's not FLOSS), but I'm pretty sure Violentmonkey autoreloads script files when that script was installed from a local file (maybe I had to enable it somewhere).
It looks like you're right, I may try that instead in future.
The userscripts I've made have been mostly for work and I immediately dismissed "Violentmonkey" as unsuitable because of the name, I'm not going to ask my clients or their (less technical) clients to install something that sounds quite nefarious. Unfortunate! ("Tampermonkey" is bad enough, but at least it's widely known.)
