Helium_Junkie said:Any of this make any sense to anyone? :/
You'd probably wind up with <8Mbps - the chart says 8Mbps, but it also says you should get ~7Mbps on ADSL, and the most you're going to get with that SNR margin is 5Mbps. DSL Zone's guesswork reckons you'd get 4-8Mbps.
It might be worth trying your modem at the master socket without any extensions, and seeing what you get.