i dunno about your gearing so throttle curv i can not say anything about but if it hover steady it is probably ok for now

pitch curve depends if u want to fly inverted in the future or will b happy with stall turns loops and rolls.

if u r happy with the simple stuff u can set pitch curve so it start to lift at mid stick, quite common in germany to do so,

if u r planning on trying for inverted and 3d learning where center stick is is very important and then i will recommend linier pitch curve
atleast from 0 pitch at mid stick to full pitch

if it make sense?

@Santhosh: Nice hover  and nice bmw too 

Hi Santhosh

Trex450 pro is cool, nice fly and test, please send me your email or phone number, I need help to build my HK 450 Pro TT
Am from Calicut
Celix