In the original impure twins paradox thread I tried to introduce a scheme that tried to put the travelling twin under the same effective acceleration as the Earth twin to try and elliminate the effect of gravity from the classic twins paradox. How successeful that was, is debatable. This new version puts both twins under identical acceleration histories, while still producing differential ageing. Hopefuly, this will refute all claims that General Relativity is required to resolve the classic twins paradox. Earth in the classic twins paradox is replaced by a small space station so that we can ignore gravity. Twin A launches from the spacestation at the start of year 2000. At the start of year 2010 (according to the spacestation calender) Twin A turns around and starts to head back and at the same time twin B launches with exactly the same acceleration and reaches exactly the same cruise velocity as twin A did 10 years earlier. In the year 2015 twin B passes twin A on his way back and turns around so that they both arrive back at the space station in the year 2020. Now both twins experienced one launch acceleration event, one turnaround acceleration event and one de-acceleration event and reasonable care was taken to ensure they accelerated at identical rates and cruised at identical velocities. They only differ in launch and turnaround dates and total journey times. Twin A will now be younger than twin B and acceleration is NOT the explanation of the differential ageing because they both experienced IDENTICAL acceleration.