Just before I go, I realised that I forgot to introduce you to the Mother Machine -' Biddy'! This was a 21st birthday present to Mum from Dad and yes, even though mum has a lovely name - Carmel Josephine - she has always been known as Bid!
So if you are sewing on a 'Biddy' you will have a foot that looks like this:
and it will do the job of straight sewing just as well as the newer one on Betsy!!