Originally Posted by CunningFox
And they all give you a whole bunch of great blueprints in Nuts and Bolts.
I don't think that's how it goes.
According to Rare Witch Project, using the Stop n Swop items from Banjo-Kazooie unlocks the new blueprints in Nuts & Bolts, while Stop n Swop II is going to be used for some upcoming game.
For the record, I only have 5 SnSII items, yet have all 7 of the blueprints.