Ashburton Rans spread

Below we have a selection of Rans aircraft as seen during the SAA Ashburton fly in.

Above is the Rans S-6S Coyote 11 ZK-DIG2 , c/n 01041543 , of S P & Gavin Coulter of Geraldine. It entered our register on 26-01-2005.
Below is the Rans S-6S Coyote 11 ZK-MOL , c/n 02041448 , originallly with Michael O'Keefe of Geraldine from 26-03-2007. An ownership change to Warren Baxter and Elizabeth Scott of Ashburton took effect from 12-08-2008.

Below we have the Rans S-7 Courier ZK-ROO2 , c/n 05-6430 of Howard Scott from Woodbury. Registered since 06-06-2008.

Last we have the Rans S-6S Coyote 11 ZK-WTE , c/n 02081869 , built by Mark Rollinson for the Waimate Aero Club and registered on 13-01-2011.

Can anybody decode those c/n's please ?