lean touch - find properties of leanFinger class

Hello there!

I have a feeling that what I'm asking might be horribly simple, but I just can't find the answer to it.. Be gentle...

I'm trying to return the screen position of a single finger touch, using LeanTouch, as documented in the LeanTouch docs. I've tried a whole load of different approaches, but I can't work out how to get it. 

I'm trying to either pass the property forward as an arg to a custom event, OR look back and find the property after the event has fired. Either way, I can't work out how to access it :( 

If anyone could point me in the right direction, I'd hugely appreciate it!

Thanks so much!