For F3C competition flying:

Quest Corporation: http://quest-co.jp/rc/index.html

Popular Place to buy Quest kits: https://www.rcjapan.net/index.php?main_page=index&cPath=152

My particular set-up is a box stock Quest 787 with only 1 modifications and 2 option parts:

Modifications:

1. Blade grip arm plates ( changed to create a 90 degree angle between the grip pivot and swashplate control rod – pitch angles are very symmetrical)

Option Parts:

1. 220mm Short Main Shaft https://www.rcjapan.net/index.php?main_page=product_info&cPath=152_155&products_id=11189
2. 80 Durometer Damper Set https://www.rcjapan.net/index.php?main_page=product_info&cPath=152_155&products_id=15645

Electronics Set-up:

1. Futaba CGY760R https://futabausa.com/product/cgy760r/
2. Futaba HPS-HC700 Cyclic Servos https://futabausa.com/product/hps-hc700/
3. Futaba BLS276SV Tail Rotor https://futabausa.com/product/bls276sv/
4. Futaba 1800mah LiFe RX (used a buffer pack) https://futabausa.com/product/eba0146/
5. Scorpion 4625-520KV F3C Version Motor https://www.scorpionsystem.com/catalog/helicopter/motors_4/hk-45_1/HK_4526_520_F3C/
6. Scorpion Tribunus 130Amp ESC (settings ALL Default except BEC Voltage set to 7.1V) https://www.scorpionsystem.com/catalog/speed_controllers/12s_tribunus_sbec/Tribunus_12_130/
7. FullyMax 6s 5500mAh 70C (2 in series for 12s)

Blades:

1. FunTech 730mm F3C https://www.rcjapan.net/index.php?main_page=product_info&cPath=68_105&products_id=27028
2. FunTech 105mm 3-Blade Set https://www.rcjapan.net/index.php?main_page=product_info&cPath=68_105&products_id=15727

Body:

1. Reference from Y’s Factory with Hayashi-san Paint