Hello Mick, yes I remember you mentioning this to me before, but I don't know any other way of collecting, this is how I have always done it, long before any worthwhile reference books existed to help me so I just collected as much as I could and studied every last detail, casting mod, colour change etc, etc.
Two apparently identical Y-5(B) Bentley models may only (and do), have a different brake lever casting, I find odd that nobody else seems to have noticed before, the same with the Rolls-Royce collection with two Y-7 Rolls-Royce models, only being different regards the headlamp castings and so it goes on.
I have recently had all available #24c Silver Shadow models lined-up in their 'Time-Line' and it totaled 23 versions, before the conversion to 'Superfast' wheels!!
I like to think I have taken 'Obsessive Collecting' to the limit, because if I hadn't, someone will come to me and say..."the roof circles on my #24 Rolls-Royce are not level, but my other examples are, why?"...so on my models, everything is noted and recorded for posterity, I hope!
Now, I must dash, just noticed the word 'MATCHBOX' on Eight of my #44b Phantom V models are leaning slightly to the left...
Ghosty.