Find a satellite close to your center lnb postion which is strong.
Make it you new center,
use the cheap satellite meter and hunt for the signal, left and right, up and down.
When you get a signal attach the receiver and scan to verify that you are on the correct satellite. (Don't scan with the signal meter attached)
Start skewing the dish and hunt for signal on the two outer most LNBs. only skew adjustments.
Once you have the two outer most LNB receiving a signal, retune the center LNB and perform a fine adjustment on Elevation and skew for best signal on the three LNBs.
All other LNBs added later will be peaked by movement on the rail. (No more elevation, azimuth or skew adjustments)