Air duct modification done. I inverted 1/3 of the bulky passenger air duct case to hold the mini sub secure in place - what a struggle. So now I am able to finalize the lower dash.
Super snug fit. Absolutely shock proof.
I also installed footwell lights and a new dark burl oem shifter knob (had to install a metal casing/fastener from an old knob first, fun
)