I seriously question "major improvement" and ,regarding damage,I have never experienced any problems.....whereas,it is all too easy to cause a break in the wiring with the plug & tender awkwardly placed socket.Once installed,it is best left undisturbed.Removing it either requires nimble,supple fingers and hawk eyed vision or Hornby's special tool. ...which I must invest in,I keep reminding myself.Thus,for returning the model to the original Hornby box,you are stuffed,unless you indulge in polystyrene carving with a craft knifePerformance? On DC analogue,to compare ....A4 drawbar & wiper versions run better than plug & socket Merlin,a later version.
It would be helpful if Hornby adopted some consistency throughout the range with semi-permanent coupling and new style packaging.We currently have a mixture of both,...viz: Great Gathering A4....plug & socket....new Star & recent version Grange...semi permanent and new clear bubble packaging.The new sound version rebuilt Bulleid does use the new system,thus,hopefully,what should be on the market in future will adopt this method.Fingers crossed.....in my case,literally.