I wanted to make a medium sized tray but it had to look interesting. I decided to use mahogany and oak to give contrast. In this video I show how to make a template for router guide bush work. It is important to understand the "plug" and "hole" aspects of guide bush routing. I am happy to send a copy of the Template Offset guide but you can download it direct from the Axminster Tools product page for their Metric Guide Bush Set (it is currently on special offer):
https://www.axminstertools.com/
then search for product code 502571
My other videos that may help with the concepts are:
UJK Guide Bush Set
   • UJK Guide Bush Set and Axminster Temp...  
How to make router templates
   • How to make router templates