The bridge posts aren’t standard, they’re 7mm in diameter. They require filling in your original bridge post holes with dowel, then re-measuring and drilling. No problem for your local guitar technician. The wire can be sent down into the body directly below the bridge and out into the bridge pickup cavity, then through the access holes into the control cavity. We paired this with the Powerchip in my workshop and it works really well to blend any combination of neck, bridge and piezo pickups. The sound of this unit justifies the price, it’s a top drawer piece of hardware 😁👍🏻 The wiring isn’t super difficult, but not easy either.
Overall, medium difficulty installation and a top quality sound and operation when combined with the Powerchip. If you don’t have much experience working on guitars then call your local guitar technician 😁👍🏻