Hii, the servo is brand new

it's been used twice its a Alturn USA Low Profile Digital Servo BB/MG (High Speed)??
And is there anyone i can talk to or websites for diff parts and ansmann bit's?.
Also my slippers set with a 3mm gap from the spring to adjuster just like the manual say's, i know they can be wrong but i don't know any other way to set the slipper
Declan