I am of the mind of several of the above posters; I never ask for advice in JoAnn's--I just estimate what I think I might need and buy it. If you are near Whittle's in Kentucky, now there is where you can get some excellent advice from everyone there, even some of the customers!
But I see you're from Florida, so remember that when you are passing through Tennessee on I-65 and watch for them; they are just above Bowling Green in Kentucky.