I stand corrected. I do have the Takatsuki app6ga which only has the model number and no manufacturer. I always thought it was by Wisa. I finally got the Jun Air pump working (actually my version is by Werther international, P15-TC1) and it works well but it cycles and produces a loud POP as it switches. I will try a slow start module and see if that helps. If that fails I may need to set up a large tank and either leave it on or suffer the wait each time I go to use it. It is pretty quiet but I may yet move it out of the room.
Next step is to re plumb the air supply and include a surge tank. Not expecting much, if any gain, as the compressor already has a small tank.

