[mman1506]

While aluminium isn't that exotic of a material the places we use it are kind of odd. One of our sponsors donated literally 500+ lbs (5000$+) of military grade 7075 hardened aluminium out of their scrap bin.

While I usually subscribe to the theory that if you need to make a part out of 7075 (other than shafts and gears) you are doing it wrong it's often cheaper / easier for us to make parts out of 7075 that have no right to be (encoder mounts, jigs, soft jaws).

We're also adding some carbon-fiber/wood composite and delrin parts for champs.