Could someone point me to where I can find the physical schematics of the above? I need distances for sensor to d-block, sensor to faceplate (i.e. without d-block) with and without filter wheels (9 position for the ST-8 (original faceplate replaced) and 8 position (original faceplate replaced) for the STL-6303). I'm building a spectrograph and I need to make the physical calculations for grating distances, etc. Thanks and all the best. Roland Casali.