Set up with Regular LR-510 Atty,,put small ring over Atty and screw down all the way,,,, put metal bottom tank on,,, then clear window,,, put an Ego adapter on the bottom, if you don't have an Ego adapter then a sealed 510-510 adapter,on tight,, once all is set up put first top cap on,,,,,, now fill the tank with syringe, then O-ring and final top cap on tight. vape away, This 510 Atty mode has been working very well over big mode with no leaking, no flooding, for me.