The knobs are Guasti Wire knobs from Marvac Electronics. I actually got them for another project, but liked the way they looked on the Millett. The top is a 1.5" x 1/8" aluminum bar stock piece that "free floats" so I can get to the bias points. The wood on either side that holds the aluminum down is 1/4" zebrawood that I cut an edge groove in to overlap the metal. The box is bamboo (6"x9"x3"). It's not quite as nice as I'd hoped, but considering the tools I have to work with it came out nice enough.
Thanks! I couldn't think of any other way to clamp down the wood pieces and make it easily accessible to adjust the bias. Later if I get ambitious or bored I might vent the bottom and move the bias trimmers to the bottom of the PCB so I wouldn't have to remove the top. I think if I were to do it again I would put a small panel meter someplace and put the test points and trimmers on the back panel so I'd never have to open it up.
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