BYOC Ping Pong delay

[Zanius]

This was requested. Seems very interesting, definitely will give it a go soon.
Unverified, any cross-checking with the schematic is welcome :)


**3rd edit alread lol. Moved some stuff around for easier access.**
****Ok, this was clearly a case of premature posting  
4th edit.I double checked everything and made some more changes****
 

[gul]

Cool! I'll have to give this a go. Thanks for sharing the layout.