Hey all, I'm not sure if this is the right section to post this in but I'm new here so show some mercy! Mods, feel free to move it if it's wrong.
Anyways, I'm looking for some advice and guidance regarding component selection for my project, especially regarding servos. What i'm looking for is a servo with a very high degree of repetitive accuracy; I'm talking within a few degrees thousands of times. End game would be years of use without calibration. Without divulging more details, if my product ever made it to market (I know, a long shot but I can hope) and this servo was inaccurate, it could be life threatening. Would a secondary feedback system be necessary for this? I can also spend more than your average hobby servo, but I'd like to keep it as cheap as I can.
As for other components, I'm also looking for a small vacuum sensor, a cheap color display (preferably at least 3.5") , and some directional backlit buttons (the squishy rubber kind you see on appliances). I'm not in dire need of guidance and I think with enough googling I could figure it out, but I would definitely take suggestions from those more experienced than I. With so many electronics websites, it's hard to just jump in and start buying stuff since I don't really have the feel for the market that only comes with experience. However, the servo is a priority. Thanks!