Posted version 1.3 PCB file and compressed Gerber files. The PCB has been modified but is untested. It "Should" work but it will b e a couple of weeks before I get around to testing it. If you are not feeling brave, the version 1.2 PCB is still available. It works but has 2 unnecessary resistors that have been removed in 1.3. You can fit any value from 0 to a few hundred ohms and it will work.