Yes. The eccentric is canted slightly forward with the rods bottom dead center. Adjust those main crank pins that way, then Loctite, then driver on axle w/ Loctite. Final step is pinning the eccentric after the rods are back on.
Radius rod does not need to be pinned to the Walschaerts link, but there should be a pin to keep it from sliding too far aft and allowing the valve stem to fall out of its guide.
