Good idea, jigsaw jig for template cutting

I thought this tip would be helpful to inspiring builders out there! I will make one of these jigs for my lil' shop.
Click here to see intructions

Click here to see intructions

or t n ttt for short (tnttt.com)
https://www.tnttt.com/
dh wrote:Looks like it cuts a little bigger than the template, nice to have if don't have a router though.