UPDATED: I have deleted the old topic and made this new one because of the update that added the airlock controler. please dont judge me of the bad quality because i did not had much time to do all the picture and stuffs. 1_ you will need all stuff i have in my hotbar, (+ 1 lever, i forgot to put it in) 2_ Take your airlock/controller, and build it like how i did. after that right click the airlock controller and enable "Opens on Redstone Signal". 3_ Test if the airlock is working: (With a redstone signal) 4_ After that, start making a 2x7 platform right next of it. 5_ Make another airlock and do the same as you did in step 2, put on:"Opens on Redstone Signal". 6_ Test the other one out (Also with redstone signal) 7_ Take you lever and do what i do.. 8_ take your redstone and do what i do.. AND NOW: TEST IF IT WORKS!! Please comment down below and say what you think about it..