The following are ESCs popularly used in the 400 class Micro Helicopters. Click on the links in the following table for specification or setup information : Make/Model Specification Setup Instructions Downloadable Manual Review Align 35A Specification Setup viewable here Align 25A Same as above Same as above Same as above Castle Creations Phoenix-25 see the manual Setup Click here Castle Creations Phoenix-35 see the manual Same as above Click here Completed (T-Rex) Castle Creations PHX-Link n/a Setup Click here Complete (T-Rex) Kontronics 40-6-18 Specification Setup Hyperion Titan 30A Specification Setup viewable here