sorry, took to long to get back to you. couple of points. First if you hear air from the bottom then you are either leaking at the connection or you have too high of pressure at the platter. One way to optimize is put a needle valve on the platter and close it. At this point there is no air going to the platter. See if you can hear any. There should only be air going to the arm. you should be able to keep 45psig with the arm alone. Assuming this is the case, turn on your motor and slowly open the air until the platter lifts. You might have to spin the platter with your hand to get it started. Listen for a rub. if it is not rubbing, lower the air until you hear a slight rub. then raise the air slightly to the rub sound stops. remember the arm can siphon a lot of air away from the arm.The needle valve will help you fix this.
Finally make sure you are perfect level. If not, it takes a lot more air to float the platter.also, make sure you clean the arm spindle and arm bearing housing. You will find that you can lower the air some by doing that also.
Finally make sure you are perfect level. If not, it takes a lot more air to float the platter.also, make sure you clean the arm spindle and arm bearing housing. You will find that you can lower the air some by doing that also.