You could do it that way, I suppose. I found it handier to keep the male die in the frame. I was able to get all but the forward-most dimpled pretty easily though you have to be careful not to let either the hammer or the tool scratch the inner skin. With effort, I was able to do the last couple of rivets nearest the bend; three or four hands help - have someone hold the skin open while you manipulate the dimpling tool and hammer. I used the dies in a hand squeezer wherever it would reach. The -9 is not that different from the -6.