OK what machines were built in '75, '85 or '95?

All the very best with the project.  I hope you succeed where other Aussies have failed.  

The kit idea sounds interesting.  Just a thought but perhaps you might consider different levels of kit e.g. beginner and experienced.  It would be a shame for your machine to cop a bad wrap just because a Noobie couldn't put the machine together properly and either damaged your reputation or the machine.

Again though Mike, all the very best with it.