Hi Ian, when I join yarn on the knitting machine, I do it at the right hand side edge. Just hold the last of the 'old' yarn, together with a length of the 'new' yarn, having threaded the 'new' yarn into the yarn feeder, and keeping a firm hold on both yarns slowly knit accross the row to the left. You can of course do this on the left hand side too. Before you knit back across to the side where you joined the 'new' yarn, interweave one loose strand first along alternative needles for about 10/11, then interweave the second strand of yarn onto the other non used needles, then slowly knit across to the other side, keeping hold of the strands of yarn down out of the way. You have now joined yarn, and woven ends in at the same time. Trim ends when work is off the machine. Good luck Leonora.