@sdetweil Thank you! Using developers tab and console.logs, I fixed the data coming in (driven on a timer). Once that was correct, your confirmation/explanation of show/hide made total sense!

If (items.length> 0) {
this.show();
} else {
this.hide();
}

Works great!

@shicks I found it! Thanks to other posts on here.

The css for the height of the header fixes it:
.CX3 {
–cellheaderheight: 50px;
}

I still have to tighten things up a bit but at least I go this one that was elusive to me.

7652c89b-812d-4b71-8bd9-ab682f23509e-image.png