I think most vapourboteers already have their own ways of creating vapours that arent hugely overweight, since among all vapourbots Ive seen here, not one of them seems to have an unfair weight-advantege over the others

I see Marks calculator as yet another way of creating vapours, and estimating weights since it seems to be far from perfect right now and neglecting certain factors like weight reducing holes and stuff... so as an answer on Andys qeustion, its great to have the calculator as a handy tool and I might use it, to see what a certain armour-plate is gonna weigh or so, but I dont think it should turn in some kinda bible that all vapourboteers should live by (even without the possible errors in it btw)