I've sailed on 2
hull Number 1's and both boats were difficult to put it mildly! One was a Swan, the other a Warquiz (1997).
Both boats suffered from taking from the plans to the actual
boat. So
wiring, for example, that didn't fit would be stuffed, streached, cramped or rammed into any space and you could hear the bosses say: "Just do what you can and we'll fix it on the next boat".
So your Grandpa was prolly right!
Work out the speed of throughput and given 3 months for the first boats' problems to filter up to engineering and back down again. So for a mass production
boat be wary of
buying the first 10 hulls, perhpas.