On the Wilkinson VS-100 "chrome" bridge, I will install the black Graphtech piezo saddles. There is going to be some silver/black mixing on this axe, I think it's a cool look and adds some visual variety.
I know it will be some managing of the piezo wires on the bridge - that will be interesting. It was not fun to figure that out on the Trem King bridge I have now, but I made it work well enough. I have seen people on here sharing how they have drilled holes to hide them, so that will be cool to try and learn from. Something like this perhaps (not the same bridge but I like the black/silver look and the hidden wires):
I plan to place the Graphtech Acoustiphonic pre-amp in the battery box area (covered by a black cover not an actual battery box) to keep the wiring clean and from getting cramped. I learned that lesson from my last "swiss army guitar" build that was all too cramped. Also, I really suck at using MIDI, so eliminating that from the equation on this axe simplifies things a lot for me, too. There will be a stereo jack output, so I can operate the acoustic and magnetic through the same amp or different amps with a stereo chord. That's more than plenty for me to manage.
So there are two last two controls I will have on the front area. One is a piezo volume knob in the normal "Tone 2" position. Graphtech makes a pull-up mid-boost volume knob for the Acoustaphonic pre-amp - I do like to use that to change the acoustic sound a little.
The other control is a 3-way switch in the normal "Tone 1" position that will be inbetween the magnetic and piezo volume knobs.
Forward = magnetics only
Middle = magnetics and piezo working
Back = piezo only
For battery power, I have decided the Fishman Fluence battery back - most likely the trem cover unit. I had a lot of internal debate but decided to go this way because I suck at managing batteries properly. The wiring might be a challenge, but no biggie. I hope the bump will feel good on the back. I debated internally about creating rosewood back pieces to match the neck... but decided against it and just am going with black covers on the back holes.