[From Alan Ball: January 12, 2010]
A while ago you requested some orthographic views with key dimensions called out for the M4. Check out the drawing I have attached here. Is this what you had in mind?
For comparison , I have included a drawing of the M2 geometry, which I documented in CAD and was measured and confirmed against M2. As you can see, the basic dimensions are almost the same, with differences occurring due to M4 greater range of morphing motion.