BEST 'ERGO' ?

I remember reading years ago that the fixed head engine was reduced in size during the design to bring the weight under 1 ton. Dont know if theres any truth in it though.
Also that there was a high rejection rate on the production line but how many also slipped through the net.
So it could be poor tooling and casting that didnt help as it seems by all acounts you got one that was either super reliable or more likely one that ■■■■ it self on s regular basis.