Chainline Question

Is there an online tutorial for spacing out the rear hub? I kept looking at it today thinking that was all I needed but the cog is right on the edge so I don't understand how it would work? Or am I overlooking something obvious and being a bit stupid?

As an example, if you removed the locknut from the right side and put it on the left you will have shifted the hub across by the width of the locknut. That may not be able to be done with the locknuts in this case but is just to demonstrate what it means. The wheel would then need to be dished slightly to keep the rim centred in the frame (tighten left hand spokes, loosen right)

I see you also use a freewheel so spacing may not be a good idea anyway as it would though the chainline out when flipping to the freewheel. So not sure why I bothered to write the first paragraph now :-)