Memo to self

Which is the plural of memo, memos or memoes?

Don't use dark purple waste yarn to hold dark purple stitches when knitting.

I'm knitting a second pair of Knucks (I never blogged about the first) for Kiddo, because she has taken over the Knucks I knitted for myself. I'm using two balls I got in Ghent, where I went before I got a blog. One ball is a multicoloured Regia 6-fadig sock wool in shades of pink/purple. The other is plain dark purple, the make called Annell: you can buy it here (if you speak the right European language, which might be Dutch).