Template Repeater: Template Properties Bindings

In my current project I’m using lots of template repeaters, with Repeat behavior set to Dataset.
Say that my template has 2 Custom Properties: tagProp and uiProp.

tagProp is used to bind a Numeric Label's Value to the value of a tag: in this case tagProp will be set to the tag path of the tag and Indirect addressing is the way to go.

uiProp, however, needs to be dinamically bound to a Custom property of the Root container where the repeater is defined: how can I do that? The only way I found is the Cell update binding of the Template Parameters property on the Template repeater.

I’m using Ignition version 7.9.9 (b2018081621).

Thank you in advance, regards