Here’s a different way of securing your work instead of using knots.
By looping one way and then the other back and forth, for me is quicker than knotting each intersection.
Look at the attached diagram and follow the direction making a criss-cross knot at the start of each column or row but use a loop at each intersection rather than a criss-cross knot.
I have made a quick video, take a look at my Facebook page https://www.facebook.com/pages/Butterfly-Loom-UK/1409387595958212
diagram – I’ve had a new laptop and Windows 8 is driving me barmy! I cannot, for some reason, scan to a PDF – will upload tomorrow if the laptop is still in one piece!!!