It’s a bit hard to explain what I meant with that without showing it on video but there are quite a few unsolved focusing problems with Slate (for many years) which I thought CommonUI fixed with their new viewport implementation but I was disappointed to find out none of that was really different. Basically there are so many ways focus and input screws up that the original Slate can be impossible to work with unless you first build a frame on top of it with workarounds and fixes to keep the focus from going mad. No plugin so far provided a stable base besides what I am working on.