Radio Adjustments and Information
 

Ok, so I haven't been in the RC hobby for about 10 years and I just got back in 6 months ago. I bought a used nitro stadium truck and completely rebuilt it including upgrading the servos to hitec 645mg's and the radio gear to an Airtronics MX-A. So far its worked great but there are alot more adjustments then I am use to. The instructions list them but dont tell what they are so I'm hoping someone can give me details about the adjustments listed below, an explanation of exactly what they do and how to properly set them. One adjustment I know I need to fix is that by the time I'm at half throttle on the trigger pull the servo has opened the throttle all the way so I need to know how to adjust whatever setting so the opening of the throttle correpsonds to the entire trigger pull. Thanks in advance for any help....

List of settings I'm not sure of:

Sub Trim
Arc
End Point Adjustment
Dual Rate Steering