After some additional tweaking and, most recently, using my mobile phone as a hotspot and hoping to benefit from a faster upload link; I have managed to get another ISS packet I-gated/SatGated successfully.
Unfortunately, the bulk of the packets are seen as duplicates and although I can see inherently why they are ... although I've asked questions in a number of places, so far I am not sure as to how I can improve the speed/reliability of the I-gating process.
Here's my second, out of many attempts, at relaying an ISS packet to the Internet. This particular pass elicited 12 successfully received and I-gated packets of which 11 were discarded.
I think location and compromised antenna conditions mean that this is not quite ready to be set-up on a permanent basis.
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2020-11-26 18:49:10 GMT: F4FEB>TWRSR6,NA1SS*,PCSAT-1,APRSAT,qAR,G8VVY-6:'|=Xl `/]73 de JEROME via Sat JN37GJ