Hello All,
Update - I have found a document with coloured photos and a much more understandable description of how to change the valve cotters which I have attached also. Now I read this, it explains why I thought there was a video - it is very clear and the photos make a world of difference. FYI you need the kit it is available from Lockwood Aviation Supplies and I managed to get the valve compressor tool from Leading Edge Air Foils but they are now claiming they do not ship outside of the USA (after they shipped to me in New Zealand already), so you may have to use a forwarding service.
Regards
Trevor
Regards
Trevor