The best way i have found to build the shock is like this:
Fill the body to the middle of the threads.
Insert the piston and let is sink all the way to the bottom of the body as far as it can go,
put the foam,spacer,and O ring in and slowly push them in with a small allen wrench until they seat.
now you want to remove all the oil from the top area of the O ring with a Q tip or paper towel and make sure you get all the oil from the O ring.
Now with the piston still at the bottom of the body, slowly screw the cap on until it is tight. Every time the piston starts to rebound, Stop and slowly push it back in. Once the cap is just about tight is when you want the piston to start to rebound. Fully tighten and then you can pull the shock shaft out.
This is the way i always build my shock and it eliminates all of the air and eliminates most of the rebound. I want about 1/4 inch of rebound and that is it. There will be no lock up anywhere in the travel.
