Uploaded 6-Mar-13
Taken 5-Mar-13
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Photo Info

Dimensions3264 x 2448
Original file size3.83 MB
Image typeJPEG
Color spacesRGB
Date taken5-Mar-13 21:56
Date modified5-Mar-13 21:56
Shooting Conditions

Camera makeApple
Camera modeliPhone 4S
Focal length4.28 mm
Focal length (35mm)35 mm
Exposure1/30 at f/2.4
FlashNot fired, auto mode
Exposure modeAuto
Exposure prog.Normal
ISO speedISO 64
Metering modePattern
Trim channel mounting process

Trim channel mounting process

After a few experiments, I landed on using #8 wood screws to mount the trim channel. Pan head screws were just tall enough to push the aluminum out a bit - though they are a better choice from an adjustability standpoint. With wood screws, you have to be more precise. The process I ended up with was:
Level the trim channel
At mounting point, use a countersink on level line (before drilling a pilot hole). This creates a relief in the wood, and a nice wood-screw friendly shoulder in the channel.
Drill the pilot hole (countersink first does a better job of centering the hole in the center of the channel)
4) Drive screw