Among the Friday HamX workshops is a NO-SOLDER Precision NTP Server by Bradshaw Lupton, K1TE. Build a $25 GPS timekeeper, accurate to 20 nanoseconds.
Come prepared. Bradshaw has arranged a way to to pre-order parts through Amazon. (Note, bill of parts is for two GPS NTP servers. Bring a friend, share on-site, or build two units for yourself—the workshop itself is free.)
Additional information can be accessed through https://lupton.us/HamXposition/.