While I get where your train of thought is heading, may I still remind you that even size 4 builders might not enable us to build a deathstar?Should have been the classical small/medium/large. 4 just feels off to me somehow.
There might come a time when we even need a size 5 or bigger.
You know, the Bengal BLD or something like that...
As for simple basebuilding, I'll probably build my home out of empty barrels.
We sure have enough of those.