I have an invention you can have... I want one but don't have the resources.. so I'll let you build it...
It's a 5 pointed compass. Like a protractor you would use to draw a circle, only with 5 points, and you have the option to tighten into the golden ratio if you choose. And the outer points are extended further than the inner points.
I would use it to assist in the initial cuts I would make into an over waxed diagnostic waxup...
It might not be useful for some, but the way I build my Diagnostic waxups, it would be a dream tool...