OB3Squared modifications
I love my OB3Squared Hammond clone. The only really annoying thing was the external power supply. So I decided to modify the OB3 to have an internal one. And while I was at it, I have also installed an original Hammond halfmoon switch to control the Hughes&Kettner Rotosphere
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PCB after disassembly

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Cover

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Base with keyboard

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Base with keyboard

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Fitted halfmoon switch

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Top

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Corner cut out to make place for the power connector

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Transformer base

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PCB with connected wires

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PCB placed back onto base

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Power connector plate

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Assembled