I had no idea Delrin was 3D printable! The price point isn't too bad at all if it means being able to print gears/bushings and whatnot. I'll have to get a spool and experiment.
@BKobernus I would imagine you would still see some shrink. I primarily print PLA and don't deal with the shrink much (it's not noticeable anyway). Shrink definitely makes for a more difficult print.