I'm doing it! ready to FMQ an oversize throw and don't know how many spools of thread to buy - I want to buy it all at the same time, for shipping $. I plan to use a stencil called "rose meandering" - the lines are about 1/2" apart. I'm pretty sure I want to use the same (king tut) thread in the bobbin. Only some of my possible colors come in a 2,000 yard cone; some come in only 500 yard spools. How much do I need?