Hi all - this is the first model I am posting as a "Community Post" - not sure how these work. Anywhoo - this is a project near and dear to my heart, as it's been on my "to design" list when I get time. Well, moving from a printrbot metal plus (you served me well) to an A1 has really given me the "no hassle" 3D printing experience I've wanted - especially when it comes to nozzle switching. I may design other electronic add-ons that utilize the same base.