PSA there's an updated MNT Pocket Reform Quickstart manual: https://mntre.com/documentation/pocket-reform-quickstart-and-safety-manual.pdf (done by @holo_memory) which shows some critically important shortcuts and the button assignments of the trackball, to avoid some confusion for first-time users that don't have the full handbook. Watching the first impressions video by @deBaer made it extra clear to me that this was required.