Mounting the tracker bar and fitting the tubes

Now that I've got the pressure box window installed, I'm eager to see whether the pressure box will indeed hold any pressure.

Since I've got no holes in the back or side panels, the only places where air can leak are: around the take-up spool shaft, the tracker bar base, the lid seal, and the lid window seal. Of course there could be leaks around any of the panel joints as well.

Since I've put an oil/air seal around the take-up spool shaft, that should be OK, and I'm fairly confident in the 4+ coats of shellac on all of the wood panels and joints. So, I decided that the next step was to get the tracker bar mounted.

I drilled the tracker bar base ends and used it to mark corresponding holes in the tracker bar platform, then I fitted the bottom of the tracker bar with some strips of foam weatherstripping (coloring the grey foam black around the edges with a sharpie).

I attached it with some brass machine screws and nuts:

Then I fit my crazy brass tubing to the bottom side of the tracker bar:

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