And at this point I’m gonna tap out as we’ve just hit a UMG limitation ;). If you really must do it, do look for carousel menus. There’s a couple of examples here on AH and some in the Forums, by me.
You’d essentially need to construct the entire system from scratch.
Or, if you must do it with scrollbox, you’d need to fake it; it’d be a matter of adding padding to the top and bottom of that list; there’s no over-roll for scrollbox so you’d need to fake it and re-jiggle indexes.
If anyone does know how to do it right, please do tell