On various other threads there have been often vociferous comments on how appalling some 30 year old RTR models were, although we hoovered them off the model shop shelves at the time. The Jouef 40 and Hornby's half-cab Pannier are just two examples to divide opinion.   What 20, 30, 40 year old models still "cut it" for you?  I personally have never (yet) had the problems with Airfix/Mainline/Lima motors which have led to so much criticism, but the quality and longevity of mechanisms is well kn