Have you changed the bushes? If not, keep fiddling about and eventually you will crack the problem. I seem to remember that you have to have the swinging arm at a particular angle in terms of its up and down movement to get it in. If you have changed the bushes, were the inner sleeves the same length as the originals? The central tube has, I think, a lip which goes round the inner sleeve of the bushes. Could yours have caught on one of the bushes, preventing it from going fully home?
36 4G, 37 VH, 53 ex ISDT KHA (project), 54 KH(A), Healey 1000/4 (project)
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.