Your pre-amp tubes will have a HUGE effect on your overall tone. I'd start there.
And "fullbore metal" is hands down the worst pedal I've ever heard.
If you like overdrive stomp boxes? The MXR Zakk Wilde or Boss Super OD are awesome.
I've got whatever the 6L6 tubes are that come in the dual rectifier one.
I thought the Zakk W pedal was just the fullbore pedal!?