A good discussion and good humour gentlemen.
Before we leave the concept of photocopying parts for templates, let me show you one shot where a copy of a part can enable you to have a good reference to the original when cutting. I want to achieve here an oversized opening for the arch on a piece of reinforcing card. The card will slip down into the assembly with good clearance. I'm actually getting more milage out of the one photocopied piece of paper. I've used it already to create the templates for the bottom of the entrance.
With a thought to learning by sharing,
John