Thread: using TPI gauges, besides tpi who make aluminum gauge panels for their gauges?

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Here's an even easier one.

18 gage aluminum.
Cut out with hole saws.

Use quality hole saws, Starratt - usually mail order - or Milwaukee, available at Home Depot and similar places.
Skip the Black & Deckers, they're geared to woodwork and don't run as true.

Note that the cardboard template is half-sized.
Done so that each side matches.
Just orient the template to a line on the aluminum when you lay it out.
The pics should be self explanatory.

(Incidentally, the electrical box shown above has 1/8" thick walls which are about ideal for an under-dash panel.)