To install the Fernandes kit, you will have to do some decent modifications (and routing) to your guitar. The single coil size driver can be used next to a single size humbucker, and they recommend that you use their
bridge pickup. You will also have to rout an area for the circuit board.
You may also want to look into the Sustainiac Stealth kit (
www.sustainiac.com). You won't have to do any routing for a board, and you may be able to fit the battery under the pickguard (or route a small spot in the trem
spring cavity. Two big advantages to the Stealth kit: better flexability with other pickup choices, and since it is a smaller company, they are very quick to respond to questions.
Check out both units. I have, and the differences are minimal. Listen to the sound samples and read up (the Sustainiac site will answer all your questions).
Cheers,
Butch