http://www.readyheli.com/Custom_Heli_Parts_T_Rex_500_Carbon_Fiber_Frame_S_p/chp-t5014.htmРама под сервы JR, как известно в стоковой раме JR сервы себя чувствуют не совсем уютно.
Custom Heli Parts T-Rex 500 Carbon Frame.
For JR 3400G/Z3650/3517
Every Upgrade Kit Includes:
1. 1.6mm Carbon Sideframes
2. JR G-10 Servo Arms.
4. Press Nuts for easy servo installation.
5. Carbon Servo Plates
6. All necessary mounting hardware is included.
USA Handmade by Custom Heli Parts. Made from premium Carbon Fiber Stock...These things are beefy!
Спасибо Д.Платову за наводку

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И можно затариться по части металла

Includes:
(1) TREX 500E/ESP Aluminum Bottom Bracket Upgrade
(6) M2.5 x 0.45 x 10 mm Socket Head Cap Screws (Class 12.9 Black Oxide Alloy Steel)
(2) M2.5 x 0.45 x 12 mm Socket Head Cap Screws (Class 12.9 Black Oxide Alloy Steel)
(4) M2 x 0.40 x 10 mm Socket Head Cap Screws (Class 12.9 Black Oxide Alloy Steel)
(1) TREX 500E/ESP Aluminum Battery Mount Upgrade
(2) M2.5 x 0.45 x 14 mm Socket Head Cap Screws (18-8 Stainless Steel DIN 912-A2)
(2) M2.5 x 0.45 x 8 mm Socket Head Cap Screws (Class 12.9 Black Oxide Alloy Steel)
(1) TREX 500E/ESP Aluminum Receiver Mount Upgrade
(4) M2.5 x 0.45 x 8 mm Socket Head Cap Screws (Class 12.9 Black Oxide Alloy Steel)