All 4 soldred with tails.
Even the shiny silver side wouldn't look real good amidst a sea of black which will be the front panel, so paint the tops of the electrodes. This won't alter the functionality of the QT150 as its a capacitive touch sensor, and is designed to have the electrode not in direct contact with the user interface.
Closeup of the paint drying on an electrode.
Car Key Gnomes?
Gotta attach the keys to the acrylic key backlight diffusers somehow... the answer - GOOP! I love this stuff! (Lick the q-tip, then pickup some goop, don't repeat!)
Small slot milled in key to accomodate the fact that the wires aren't attached dead center to the electrodes.
Slide the wire through the key
Apply goop...
Then push key down and embed into goop, keeping it as level as possible and centered in the indent.
4 keys - goop curing
All done.
all that remains is to put foil tape back on the keys (I removed it because it looked crappy with the painted foil tape) and install them into the bezel. I'll be leaving a 2 or 3mm gap between the top of the acrylic backlight diffuser and the top of the key so you don't see the foil tape's edges on the bezel... which is the other reason I nixxed the first round of tape.
Until next time!