I am making a bag with a flap over the top. I am going to felt it in the machine, and I am wondering about closures. I am thinking about maybe putting button holes into the flap. Is it better to knit in button holes before felting (about 4st wide), or will they distort the flap or close over. I could just cut them in after, but I am not sure I would be as accurate in placing them this way.