It turns out that plastic tools are perfectly fine for some tasks. With the advent of low-cost 3d printers I think it makes sense to explore 3D printing as a way of fabricating specialized tools for our airheads.
So far I’ve built two tools: a clutch alignment tool, and a tool to keep the crank in place while removing the flywheel. For more information about these tools, including the STL files visit my tools page.
The next tool I hope to design is a rear-main seal installation tool.