30.5 x 20 Adaptor
thingiverse
UPDATE: I've upgraded the same adaptor with M3 screws for boards that use 20x20 but also M3 holes! This upgrade allows a 20x20 component to be securely attached to a larger 30.5x30.5 area. The hollow studs enable an M2 bolt to screw the component down firmly in place. You can print this adaptor in any material, and I used PLA with great results.
Download Model from thingiverse
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