NPAS will not increase power! First you will need to look at hopup unit see if the BB is sitting correctly, second you may need change the Oring in the loading nozzle.
This is power adjustment
http://www.facebook.com/photo.ph ... ;type=3&theater
see here for maintenance
http://www.facebook.com/groups/GBBGamerHK/doc/10150199236407551/