We have used this "OEM" circuit board for over 20 years for our guitar manufacturer customers ("OEM's") such as Jackson and Schecter. These boards are electrically identical to our smaller RETROFIT board. Except the OEM board is widened to hold the Sustainiac toggle switch controls. Instead of being 1.1 inches wide like our retrofit board, they are 1.75 inches wide. The photo below shows the retrofit board next to the OEM board. The OEM board costs the same as the retrofit board.

THE ADVANTAGE: This makes for a much easier hookup. And in the process it eliminates several wire position situations that often cause retrofit installations to squeal loudly (oscillate).
THE DISADVANTAGE: The OEM board is too big to fit most guitar control cavities. You will almost always have to route to fit the OEM board inside your control cavity. So, you trade off routing for electrical simplicity. You can see that there are only about half as many wires with the OEM board. The Jackson DK-2S guitars all have the OEM board. Jackson made the DK-2S from 2000 to 2012. Schecter uses it in all of their Sustainiac-equipped models that have a flat top (Syn Custom, SVSS etc. They don't fit well into guitars with a contoured top. For those, stick with the Retrofit board or Retrofit plus an AUX board.

Diagram showing our OEM board dimensions.

We never included the OEM board in our website before. The reason was that we wanted to have a retrofit sustainer that you didn't have to route to install for most guitars. Why are we offering this now? The reason is simple. As the popularity of our Sustainiac product increases each year, we are getting many requests for help. The reason is that the normal retrofit installation is too complicated for an increasing number of people. The OEM board trades off routing for a much simpler electrical hookup. The electrical hookup only takes an hour or so for people with a fair amount of skill. Another reason is because many people are making custom guitars. In this case, you can make the control cavity as big as you want.

OEM BOARD HOOKUP DIAGRAMS
Guitars with 3 pickups and 5-position inline selector switch. Includes some Jackson DK-2S; PDF file
pickups and 5-position CRL selector switch. Includes some Jackson DK-2S; PDF file
2PU 1 volume 1 tone Gibson toggle selector switch; PDF file
2PU 1 volume 1 tone Tele lever selector switch; PDF file
2PU SG and copies 4 knobs Gibson selector switch; PDF file
2PU Les Paul and copies 4 knobs Gibson selector switch; PDF file
1PU no selector switch, Sustainiac driver does not function as a pickup; PDF file