I have received the following query. There is no reason for not publishing for everyone to see and comment on. However please try to make comments helpful, not a slanging match as this is a serious project. I don't think that a weight applied to a pot shaft is a good way to go. The shaft friction is unpredictable. The mechanical design to cause rotation to the same point for a given angle and to prevent the weight pulling the shaft right round is difficult. If you want to build your own inclinometer I would suggest investigating either toothed / perforated wheels on a common shaft, which you can register with a light beam. This is a transmissive system. Or you could go for a reflective system reflecting from coded patterns painted on a wheel. For an analog system if you painted a spiral of increasing brush-width on a wheel and measured the width where it intersected a fixed beam of light this would be proportional to rotation.