I've got a massive big button box that I love to rummage through to find the perfect button for my finished knits but I often find I don't have threads to match the colour to sew them on. How do you get get round this without having a big box of threads to match? I've got a wee set of maybe ten threads in basic colours but quite often have to resort to splitting an embroidery thread to get a better match (which even then often isn't great).