Hi my viper came out at 9.3 kg dry. The C of G can be seen by the red lines at front of hatch.

You can get a pdf file called Bz78178 from post #417 on page 17 of this thread. The file is listed by essyou 35. I hope this helps. Mine is basically set up with this set up except i have 60 mm flap deflection.

Jason