Are your jacks grounded to the enclosure?
No, but they are grounded through the pcb.
Are your jacks grounded to the enclosure?
You're using isolated jacks, so you'll need to provide a ground path to the enclosure via a jack sleeve connection another way. You can run a wire from one of the jack lugs so that it sits between the enclosure and lid when closed. You'll have to remove the paint from the point of contact to ensure a good connection, though.
Have you set the gate threshold and the bias via the trimmers?
I would suggest that you take the PCB from the enclosure, inspect your soldering, and ensure that the components are correct. The following thread contains information about the biasing procedure.I've tried to mess with them but since I'm getting no modulation/chorus I cannot say whether or not they are set correctly.
I've eventually set them both at noon while testing