A descent roto-moulding (or roto-casting depending on your terminology) machine is quite a bulky thing. Add to that the limited space that you have as a student (or freelance product designer) and you have a dilemma - you would like the equipment, but need it to be stored in as small a space as possible.
The solution to all of these problems comes with K'NEX. This child's construction toy is lightweight, strong, reasonably cheap and best of all completely adaptable for different purposes. These instructions will show you how to build a fully functional machine with a big enough space for descent models and projects.
This is prefect for small plastic casting, but also for more 'family friendly' projects such as Easter egg making (more on that later)...
Step 1: Counter-balance (x1)
This can be done using normal purple connectors and white sticks. You also need to add some wheels to this part to add ballast.