>At some stage I can see it >having to turn on it's own radius. I figure I need ones a metre or so >long... Please throw your thoughts this way as I am stumped here in >Australia. check your army depot for spare tracks for those remote bomb disposal robots??? ;))) Sorry just a sudden thought. Obviously someone makes them. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body