I have been using the OSR6 for some time. It is indeed more comfortable than the OSR2, but I feel that it lacks the suction module. I have seen the principle and construction. In theory, it supports connecting to a vacuum pump and the like. The MultiFunPlayer also has the Suction shaft A1, but I haven’t figured out how to use the pump without damaging the cup. Do you guys have any thoughts?
Also, how big the suction force should be for this pump and how big the pump should be? I’m not sure about this, and no brother has DIY this part?