Thanks for the support, dudes!
My PCE IFU is actually in the hands of turbo himself as we speak (for RGB) and I've ordered the few parts I need to give the TG16 composite out which i'm definitely looking forward to. I decided to actually use a TRRS (single 3.5mm audio/video) jack, gut the RF, and install it in the RFs place to avoid having to drill excessive holes in the case which I just know i'd screw up. I did also create one of those solderless composite cables for the time being that just connects to pins on the expansion port.
One last thing: Are the ten no koe 2's worth picking up? I know the backup isn't especially useful, but would it be worth buying one locally for $40 for future modding opportunities?