Many thanks for all your help with the cord.
I came across an explaination for the cord on a website here
www.facebook.com/BoogieBeau?p=163I dont know if posting links is allowed here but the explaination is that the cord is to tie on mast base as safety in case they become detatched. The lock on the mast base has optional FULL lock, or PARTIALLY locked (apparently called 500 neutons) This means that if a body part comes between the mast and boom, the mast foot will pop out under pressure!
I have a button next to mast base to open it and release the mast, there is a lever the other side with the words FIX and DIN I can only assume that FIX is fully locked and DIN is the partial lock option?
Thanks again for all your help
Jimmy