Cooling Ring for Hotend V9 (Orca)

SummaryJust finished my cooling ring for the V9 Hotend (Mendel-Parts) of my Orca v0.30.Some minor changes are still necessary and i even didn`t test it by myself XD NEW VERSION UPLOADED !!!!InstructionsThe lower part can be printed "as is".Do NOT slice the lower part with Slic3r ! it will not work, use Skeinforge !The upper part should be redesigned to fit a fan of your choice. NEW VERSION UPLOADED !!!!Now with bigger holes at the bottom and one mm higher Ring.also made a comparison picture of printing the top part one time without and with cooling (printed at 30mm/s).