Installing Airwild servo arms?
 

To all,
I just bought a few 645's and wanted to try the Airwild arms on them but, I'm not sure about cranking down on the screw to get them on. I know it says that they should be snugged on with the screw but, I've damn near stripped the phillips head trying to get it on just half way. Does anyone have any tips or am I just being too cautious with it and just keep cranking it? I might try the SHCS that they sell also. Thanks in advance.
Stangevil29