Peeps here is a direct quote from Peter Robinson to me on how to build X-ray shocks, and it works great. Ever since following these instructions I have had no problems at all with my shocks.
Thank you Peter!!
1. put the bladders in the caps.
2. make sure the pistons are 4 holes open.
3. fill shock with oil.
4. pump the piston slowly up and down to get bubbles out.
5. wait a couple minutes.
6. push the pistons half way up so the oil in the body makes a little dome.
7. slowly screw the cap on.
8. wipe the oil and check the rebound, they should fully rebound, but slowly.
9. if you cant push the piston in, or they rebound too quick, crack the seal on the bottom of the shock (while holding the shock upside down) and push the shaft in, twist the cap back on, check the rebound again.
10. repeat step nine until all the shocks are the same. make sure the shocks are all 70.3-4mm, and your dialed
Its on page 148 also