Blueprints should include what machine they're used in

[GreyGoldFish]

This is an enhancement that I feel would help out new players specially, as it's often unclear what type of machine a blueprint requires. I'm not sure how the machine types are implemented internally, but the blueprints could have a MachineType attribute or something of the sort.

[Nextej]

I think it would be better if stuff from general "Recipes" category (Kitchen recipes, letters, OSRAT) was properly split and each category (of the current "Stove Recipes", "Oven Recipes", "Mashing Recipes", etc.) had a hoverable tooltip along the lines of: Paperworks category (!): "Recipes available to craft at: Printing Press and Copy Printer"