A bit of a test, I've had nothing through for 2 days on the onetel server, just checked on Garble groups & seen Peter's request. I've forgotten my signon details so I'll reply here & see whether it turns up on Garble. I've got some 12mm nylon (well, fairly sure it's Nylon - any simple tests?) which is probably big enough, I'll check later. Give us a clue, what sort of accuracy, what's it for?