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Museum of the Game® & International Arcade Museum® Forums
I designed a 3D printable mounting bracket for the Alan-1 vector monitor transistor block. This lets you mount it upright behind the monitor chassis out the way. I have it mounted to the left of the back of the chassis on my Tempest. It will hold the board in place with gravity alone which makes for easy access, but there are 4 screw holes if you want to further secure the board against the bracket.