1 · Hardware
2 · Full apps
Hemisphere (the dual-applet system) is always included unless you drop it under Extras. Each app costs flash — the build fails with a friendly message if your selection doesn't fit, and the exact size is reported back. (Live size estimates arrive in a future update.)
3 · Hemisphere applets
All applets are included by default. Untick to leave one out and reclaim flash for apps.
Show all applets
4 · Extras
5 · Build it
Your build request:
Opens a prefilled GitHub issue (free account needed — just press Submit). The build takes a couple of minutes; the bot then comments a direct download link anyone can use.