If you run FLEx on Linux, you may want to be familiar with these Internet sites:
https://packages.sil.org/ is the SIL software repository for Ubuntu and Wasta-Linux.
https://github.com/sillsdev/FwDocumentation/wiki/Installing-KMFL-on-Ubuntu is the Ubuntu wiki.
https://scriptsource.org/cms/scripts/page.php?item_id=entry_detail&uid=jkmg32jj3r discusses keyboarding.
https://lingtran.net/Wasta-Linux discusses Wasta-Linux.