Hello, I tried to setup some simple setups, but I discovered that when I attached inventory reader onto Storage Drawer, it's "Fill ratio" was only showing one of three values - 0, 0.5 and 1.
And 0.5 was shown all the time whenever Drawer wasn't empty nor full.

I wanted to use fill ratio to accommodate for future upgrades that would make simple item count not efficient.

I'm attaching screenshot showing That there is only 7 out of 2048 items in drawer and it's showing fill ratio of half.

I just noticed that Fill ratio is working a little bit differently than I thought it was.

Still there is no way of detecting how far to full drawer, because variables behave in the same way on not upgraded and upgraded drawers.
I guess I'll use item count for now.
Not sure if it's possible to do something with this issue then, but maybe some additional compatibility in the future would be possible.

Indeed, the fact that Storage Drawers basically has stacksizes > 64, this introduces some issues. In the future, we should probably add custom support for the SD API.