Wow this turned into a pissing party. Don't let that hold back your creativity OP. Congrats, esp if it didn't cost you a dime but your time. Little bit of burning on that cutout though yes?
But yeah, the cupholder thing exists. If you don't have CIC, then someone also made an aluminum holder that straddles between your front deck air vent (where the Logic7 speaker would be) and your vents (though I actually don't think the execution is that great).