To be clear before we start I am very happy with a stable fibre connection and reasonable speeds using a Billion 8800NL router
Now that G.INP has (recently) been enabled the reported errors are minuscule
RSCorr/RS (%): 1.8720
RSUnCorr/RS (%): 0.0000
and the CRC's per hour usually sit at 2
So how significant in terms of DLM (or anything else for that matter) are the rtx_x and rtx_c graphs both of which mostly sit at under 10 with occasional spikes up to about 50
As an aside there is some external interference which only shows up on the ping graph (my neighbour gets it as well) every 2 and a bit hours