In a recent video I posted getting 18 minute flight times with my modified Phantom 1, with gimbal and fpv gear.
In this video I go over the basic mods I have done as well as gains and voltage settings.
Please drop a comment if you have any questions or requests, Should there be interest I will do a video on creating a combined battery pack
Simonsays landing gear: http://www.shapeways.com/model/1066547/dji-phantom-landing-gear-kit-v3.html?materialId=62
Props:
Multirotor HQ Prop - 9x4.3 - Black
http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=165_261_370&products_id=2848
Multirotor HQ Prop - 9x4.3R - Black
http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=165_261_370&products_id=2849