As the person teaching the acrylic fabrication course, I felt I should chime in here. For this course, we'll be working on a calcium reactor. If you've got some tools, or access to them, you'll be able to build a high-quality reactor for less than, or about, the same amount you can buy one of the premade ones, in addition to learning skills for making just about anything out of acrylic, using the same techniques used by professional facilities. In addition, you'll learn some of the suppliers for purchasing materials, materials properties, safety, and many other topics.
I'll be providing templates for people who can do the work themselves, so that those with a router table will be able to purchase cut-to-size acrylic locally and construct all the parts, including keyholed flanges.
Proper gluing techniques, and proper glues, will also be taught. Those taking the course will also be able to make high-quality acrylic aquariums when completed with the course, and be able to determine proper wall thicknesses required for the desired aquarium size.
Hope this makes some people interested, and feel free to ask more questions about the course, if you need to.
BRIAN