NES Slotmaster Eject Flex MKII

MKII Small Batch Initial Release: 12-26-2025 Expected to ship January 5th or sooner. (These may sell out fast)
MKII Full Restock Expected Mid-Late January. 

The NES Slotmaster Eject Flex MKII is a replacement 72 pin connector project for Front Loading NES Consoles. 

This version of the Slotmaster is exclusive to Laser Bear Industries. It uses a custom single piece flexible PCB, we also include our new custom gear linkage cam actuated ejector mechanism, this allows for the removal of games by pressing an eject button. The full mechanism sits inside the case with the top door closed. We developed these changes after discovering issues with the original design. Our updates were developed independently in house without access to source files, they are not available in the open source design.

The MKII addresses compatibility issues with "short pin games" this is accomplished by routing a groove into the connector which allows for the 

Watch the assembly guide here: https://youtu.be/G4UwctYl8WY
(MKII Guide Coming Soon)

This is based on an open source hardware product and build instructions can be found here:
https://github.com/ShawMerlin/NES-Slotmaster/tree/main. 

While the main project is open source our custom flex board and mechanism belongs to us and are not allowed to be sold by anyone else. 

We do provide the file for self printing as part of our Printables club, but also can be purchased https://www.printables.com/model/872975-nes-slotmaster-eject

We will offer as a DIY kit (Through hole Soldering Required) and ready to install kits.

A DIY Kit will come with the following:

• 3D Printed Bracket
• 2x Generic 72 Pin Connector
• Flex PCB
  
• 2x M3x8mm Screw
• 2x M3x12mm Screw
• 4x M3 Nyloc Nut

The Assembled kit will have all of the above assembled and ready to drop into the console.

 A Hardware Kit will come with the following: (Through-hole Soldering Required)(No longer compatible with the open source mounting hardware must use MKII Mount)

• 2x Generic 72 Pin Connector
• Flex PCB
• 2x M3x8mm Screw
• 2x M3x12mm Screw
• 4x M3 Nyloc Nut

Troubleshooting for original Everdrive N8 carts.

Blinking Power Light: Some original ED N8 carts have had this happen and only needed the CIC chip reset to get it functional.
This is achieved by pressing the reset button slightly faster than the light blink 5-7 times in a row, the ED will have an internal green led go solid showing it reset the CIC. Once that is done just power cycle the console and it should work.