Someone smarter then me has probably figured this out and posted before, but today I had to replace the rear spiral drive pin in my Model 70 that has the loader on it. Because the loader frame was in the way I had to do most of the replacement through the creeper slot. I pushed a 1/4" wooden dowel rod through the holes to keep everthing lined up. I used a punch to drive the dowel rod in far enough to give me a place to start the spiral pin. I then taped the spiral pin to the end of my punch and lined it up with the hole. I hammered the pin in most of the way, pulled the tape off and finished hammering the pin in the rest of the way. I kinda liked the way it worked and thought I'd pass along the idea in case anyone else is interested. I apologize if I stole someone else's idea but it worked really well for me.