Here are the mods to the Helion 10 that makes the Helion 10 achieve more range mainly due to antenna placement. These are just minor tweaks without resorting to full DIY antennas.

Gear:
Helion 10 with repositioned VTX antennas and upgraded and repositioned TBS Crossfire Diversity Nano RX antennas (immortal T and TrueRC Bardpole 280mm)
Battery: 16000mAH Liion (about) 140c
VTX antennas: 2x iFlight Albatross 5.8GHz 150mm RHCP RPSMA (iFlight stock)
DJI Googles 2 Integra. (stock)
RC: TBS Tango II V3 at 500mw


Hardware Investment needed:
2x 22cm 5.8Ghz U.FL to RPSMA pigtails (90°) long enough to reach the air unit mounted in front.
BardPole 868MHz SMA (850MHz890MHz) 28cm long.


Music:
LuxInspira Simplicity