Follow the instructions and you will be fine. Set your rebound at approx 3-5mm.

Biggest key to building the shocks is make sure the shock shaft does not pull out while tightening the bleed screw. If it does it will draw air into the shock. You will need to bleed the screws a couple times, one time will not be enough.

Also pour some shock oil in the cap before screwing it on the body.

P.S. These are my favorite shocks I've ever built (ok well at least tie Xray's TC shocks).