Tough call. The line is syncing at 24Mbps which is within the Clean range of 20 to 31.3 Mbps.
You mention that all the internal wiring is OR installed after originally only getting 10Mbps thus it's unlikely to be on your side of things, but I see the point about worrying about a possible no fault found fee
Apols if I missed it, what was the reason for asking for a GEA test. Is there something which is affecting the line?
Does your modem monitor such things as CRC and Errored seconds? Does it frequently disconnect?
>> Potential HR Joint detected on GEA service.
If there was a HR fault it usually displays first in the upstream.
I'd also try a Quiet Line test to see if you can hear any noise on the physical line (17070 Option 2).
Other symptoms could be the dsl connection dropping when the telephone rings or when the phone is in use.