Hi,
I made the loophole and the stompbox work well. I have only one problem and it is the Dtune control. This control don't make the action correctly. I revised all values and switch, all is ok. I see the voltage when the switch is close in this point. The voltage drops very very slowly and after two minuts the voltage is 3,5V.
I think is a problem with the discharge, is very slow. But i revised R15,r16,C7 and all is ok.
thank all
An sorry whit my english....;)
Marc