3D Printed V2 Pressure Engine

So I made my next try at making an air pressure engine! The results have increased the efficiency of the engine by a literal order of magnitude... Wonder if it is possible to squeeze out another order of magnitude improvement with V3, mmh? Hope you enjoyed the video! And I hope You have a great day! Printables page with .STL files and an assembly manual for if you are considering replicating this engine... or generally just want to know a bit more about the construction of the engine. https://www.printables.com/model/271026-birdbrain-membrane-engine-version-2 Tom Stanton's Diaphragm Engine video for if you want to know a bit more in-depth what each bit in this design choice does - https://www.youtube.com/watch?v=5B1H5syp4PM Propeller from Thingiverse - https://www.thingiverse.com/thing:2618768 Music from Youtube Audio Library and Pixabay =|Chapters|= 0:00 - OP-1, the previous work 0:34 - BMV1, the prototype 2:12 - BMV2-V2, the result 2:51 - Engine explanation 4:17 - Testing 5:33 - Actually kinda rubbish? 6:22 - Closing words and future plans