Okay I’ve now updated my Traces wiki to 4.9.0 !
I include examples of how to use the new FHitResult Distance property that was my pull request to Epic.
Trace Functions in UE4
https://wiki.unrealengine.com/Trace_Functions
Using Distance Property of FHitResult
https://wiki.unrealengine.com/Trace_Functions#FHitResult_Now_Returns_Exact_Distance
Enjoy!
Rama