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I've the same pump.. Where did you get the tubes for the motor? What is the diameter?
Fanstastic. Can you share the drawing original files to email@example.com
First of all congratulations as you made big progress and managed to bring it to closure. I've similar thoughts, but I'm cracking my head on "How would you identify the piece, when you can promote or underpromote a pawn, if you are using reed switches??". My approach is to use rfid tag under each piece and have antennas under each square... and rest is almost same... in terms of using multiplexer, using engine etc..