An envelope containing an Alternative String Anchoring System (which I believe one Mudcatter may know quite a lot about) has just popped through the letter-box. Details here :

http://www.ebay.co.uk/itm/180955458839?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1

It looks very interesting and I'll give it a try asap.