jack, in reality, I'll say it because someone will eventually anyway:

be really careful with these Walkera electronics: the Tx, the RX, and the servos are all suspect, and prone to glitching and/or worse failures

the Walkera heli's are solid & well-flying, but I and others have had catastophic electrics failures (never can find out where) leading to expensive crashes

so, heads-up


as to your question: there's a lot of info about PLT & PIT on this thread; you may want to enter each term into the "search this thread" box for more info

basically I think you keep both about 11 o'clock; but this depends on your particular setup (stock, brushless, etc)

cheers
jeff