Moving BT master socket - is it worth it?

I first got ADSL yonks ago back in the day when it was still an engineer-install job. My original BT master socket was in my hall way, but the engineer re-wired it so that the master was now in my upstairs office and the hall way was now just an extension. Looking at the wiring he removed the two incoming main blue speech circuit wires from the old master socket and connected them to the two blue wires which came from my office extension, and then fiited an ADSL faceplate to the front of a new NTE5 socket in my office. The cable which links to my new office master socket is just the old standard one put in by the builders - it looks ok but it's not twisted pair cabling or anything fancy.
My question is, would I get a better ADSL connection if I moved the master socket back down to the hall way - so minimizing the amount of wire from the BT drop cable to my modem? The run of wire to my new socket is about 8m from the drop cable. Moving it would make it about 1m. Would it be worth the effort? I already get a good stable sync speed (about 6Mbps) considering I'm about 4km from the exchange.
I'm aware that I shouldn't really be touching the master socket anyway, so maybe it's a case of if it ain't broke, don't fix it?

The length of the cable will make little or no difference, but non-twisted cable is really bad for a DSL signal so if the cable isn't twisted pair then eliminating it could improve things.

6 Meg sync so at a guess 45 to 48dB attenuation?

The router stats are the best guide, and will show if its possible to go faster with some fiddling

Stats:

ADSL2+
Up 968
Dn 6873
Line Att up: 28.2
Line Att Dn: 54.0

SNR Margin up: 5.6
SNR margin dn: 2.1 (tweaked down in my router - Billion Bipac)

Recent speed test:
Up:0.81
Dn:5.86

Assuming the downstream noise margin is steady then, then I see no need to fiddle around

Pretty good speed for the attenuation

Information for you on telephone wiring to help you sort it out.

Only wire connections 2 and 5 required now, wire connection 3 was for the old electro-mechanical telephone bell.

http://www.telephonesuk.co.uk/wiring_info.htm

http://www.wppltd.demon.co.uk/WPP/Wiring/UK_telephon...

http://www.rob-r.co.uk/other/UKphonecatwiring.htm

Thanks for the advice. Based on that, I'll probably leave it as is, although a part of me is still tempted to do a quick test "just to see".

Andrew, I'd also like to thank you for all the help and advice that I've discovered on your website and forum over the past few months.
Since reading and learning from the advice on these pages I have:

Changed my cheap modem RJ11 cable to a high quality shielded one.
Moved the RJ11 cable away from possible electrical interference
Discovered I was on ADSL Max and been upgraded to ADSL2(+)
Bought a router with a more BT compatible chipset
Tweaked my MTU values
Tweaked by SNR margins

All in all I've increased my download speed from 3.5 to almost 6Mbps and my upload speed from 0.5 to over 0.8 Mbps.

So thanks!

Well I couldn't resist a Sunday afternoon task, so even though I suspected nothing would change, I moved the master socket back downstairs in a temporary lash-up.

I can report back that my sync speeds are no better or worse than before. So project for tomorrow is to buy some of those gel-filled splicers and an insertion tool to put it back to how it was.

At least now I can sleep soundly knowing that I have squeezed every last bit per second out of my adsl connection.

Thanks again for the wiring help and advice.