Tuning Air arms s510 TDR foster fitting

[vwhitten1]

How do I change my S510 TDR to have a foster fitting instead of the original fill probe?

Thanks

vwhitten1

 

[biohazardman]

 

Possibly one of these would werq?

https://www.bestfittings.co.uk/shop/fill-probes-adaptors/best-fittings-fill-valve-upgrade-for-air-arms-t-bar-type-valves-only/

https://www.huma-air.com/Air-Arms-Quickfill-with-Pressure-Gauge