I've just finished installing STi-R+ and LI Dual on my FX35.
I used grommet on passenger side to get all the wires inside, then the cables were routed though center console to the driver side. LI cpu is hiding behind the kicking plate. The rest is very straight forward.
I don't know if the speaker is loud enough when the laser hits + music is on. I hope that combination of STi-R+ and LI speakers would be enough.
STi-R plus display
STi-R plus control
Speaker is attached to parking break using two cable ties forming X shape. If you can still see Beltronics logo.
LI location before putting kicking plate back