I've been reading some old posts, and came across Superluminal's experiment to demonstrate mutual observed time dilation. I see it was started about three months ago. So have you done (or started doing) the experiment yet? I ntoice that one problem he was having was deciding whether the mutual observed time dilation would be equal (reciprocal), because one frame was non-inertial, and the other wasn't (as in the original design), or at least didn't have the same acceleration as the first one (as in the modified design later). I don't know whether you've solved it, but if you place both the clocks on the circumference, then their accelerations will be equal, thus making the dilation equal, no matter what, and, there will still be a relative velocity, whose magnitude comes out to be, v = 2rωsin(φ/2) Where ω is the angular speed, and φ is the angular difference between the radius vectors of C1 and C2. Of course, v would be maximum (2rω ) when φ=π. Which makes it easier from the experiment point of view too, since there would be more balance when C1 and C2 are placed at opposite ends. I don't know anything much about electronics, and so, can't say whether this will be very feasible. But I theoretically, this is better because the relative velocity would be greater in this model than the earlier one. A difference of rω to be exact. As to how to put this into practice, comments, anyone?