this is a great project. The pcb is well done, and helps make building a complex project easier.
The sound is great also. The controls are all relevant . The extra footswitch changes the delay time. This effect is subtle. It also seems the first time you step on the switch it takes a few seconds for it to start. After that it works more readily.
I built two of these, which both worked well. I had some issues with PT2399s bought from Tayda.