Acrylic/Plastic Supply

[Aquattro]

No problem Joel. For most purposes, extruded is fine to work with, although cast machines better (it's more dense = harder) and it absorbs less moisture than extruded. If you're making something yourself, use extruded. If you're paying big bucks for a device, make sure you're buying cell cast.
One is better than the other, just not sure if the cost warrants it for hobbyist DIY projects.