I've never played w a 3-d printer. Do you just draw your own "blueprints" to feed it, or did you find something to borrow? (If the answer would be too long for here - don't sweat it. I ought to just look it up for myself. There are a variety of little plumbing fittings/connections that either don't exist, or are super hard to find, that I will probably wind up printing some day.)
How's your pump noise? Sump noise?
These are pretty darn quiet, in the event you're not quite satisfied. Good value too IMO - you can buy utter junk for more than half their price:
SICCE Aquarium Pumps - Syncra Silent, Micra, Syncra Pro, Multi Quiet
thanks for sharing