I just revised this one, after noticing some needed improvements. It just shows how layout design improves with practice. Because I use Eagle, the verification of the first version is adequate for this one. Here’s my original comments.
Frank Clarke designed this 4049 circuit. If you like the Red Llama, you will like this one, too. 9 volts verified on the Aron’s forum that this layout works. To see my source, consult this post by stm on the forum.