It’s no use.
I made two results today but can’t get them sent. The client repeatedly reports the transfer as failed, after a random upload percentage.
Yet my connection quality is still as reported in #15 when measured with https://speed.cloudflare.com/.
In addition, I took a traceroute to two work servers and one collection server of F@H, while there was no transfer was going on. The traceroutes showed ~16…20 ms when it got to Frankfurt, and jumped to ~105…110 ms on the very next step when it got to either Boston or Philadelphia. From there, latency practically didn’t get any higher when the last responding hosts in the routes were reached (hosts at lightower.net in the route to one of the work servers: 131.239.113.97, and at upenn.edu in the routes to the other work server: 158.130.118.24 and the collection server: 158.130.118.26).
Going by the cloudflare measurements, I don’t see that my situation would improve if I booked a VDSL link instead of my current DOCSIS link.
So, uploading 30 MB to PrimeGrid is fine. Repeatedly. And sometimes several of those in parallel. But getting 24 and 35 MB uploaded to F@H, even just one at a time, is near impossible.