Giving plain flat doors a different look with a simple jig

hi I just wanted to share a quick trick i learned some years ago. its a pretty cool way of making plain doors look interesting just by making a jig around the door with some spacers and running a hand router with a ROUND base around it ,by incorperating blocks or templates you can get some cool designs and by using different profile router bits you can really get greative with designs. thank you for watching . steve