Accessing dynamic element in custom param object

Hi all,
I’m trying to access an element in a multidimensional custom param object in Perspective v8.1.4RC1.
The object is structured like this:

Object (custom param) and Component are fixed names, but there are multiple of Element (numbered 1-10).
It is possible to create a bi-directional binding that accepts both the Object property reference and can also accept a dynamic Element reference?

Yep, use the propertyexpression function

I looked at that, but it is an expression function and cannot be bi-directional.
It does allow the property binding to read, so I’ll just have to look at an event script to write.