RE: 4*60 - 4-40 or 2-56 aileron pushrods?
No, the 4*60 needs the 4-40 rods. You can get by with 2-56 scrw ends on the push rods for elevator and rudder, but for the ailerons, use the 4-40 rods.
Use a soldered end. The #4 wire doesnt bend sharp so Z bends or even an L bend whith a keeper is out of the question in my mind. A soldered clevis and then a good threaded clevis on the other end works very well. It is actualy less work than bent rods and the results are far better mechanicaly and visually.
Don