I recently built this cloned Der V-3, while bored one evening over the holidays.  I had all the parts on hand, and just needed to order the decals from Excelsior.  Its ready to go now, just waiting for spring...

UPDATE: well, on this rocket's 13th flight, it suffered what Space-X would describe as a "hard landing".  Basically, it lawn-darted, splintering the cone and blowing out the upper body tube.  Its ugly.  At least the new Jolly Logic Chute release that was onboard survived intact.  I may be able to salvage the fin can and rebuild it from there up.

UPDATE 2: this rocket has been repaired with parts from an Estes V-2 kit.  Basically, it amounted to cutting off the damaged tube and grafting on a new segment with a coupler, then repairing the motor mount.  Should be flying again soon!