First Kirk:
Helicopter Duration competition models are anything but Odd-Rocs. They are one of the most challenging to build Model Rocket types out there.
Master Competition Flyer Art Rose designed the Rose-a-Roc HD model. It's been around and flying in serious NAR and International competitions since the mid-60's.
Fliskit as done a outstanding job re-creating this model with a few small alterations from the original design making it a good bit easier for those who don't build Competition Helicopter recovery models.
Right out of the box, if constructed with reasonable care will out perform just about any other HD model (Kit or Scratch built). Adding few other "alterations" to make the model a free spinning hub, make it is almost unbeatable.
The Kit is a great rendition of a Classic Competition Model with absolute contest winning character. Highly recommended 2nd HD kit.
If you've never built a Helicopter recovery model before I'd strongly suggest trying a standard Rota-roc first as they are just a bit easier while still requiring construction of 3 airfoiled rotors along with symmetric teardrop fins (for max performance) and practice in the art of attaching rotors to hinges and hinges to body tube without seizing the hinge pin LOL!!!.
Monokote is a very thin vinyl/plastic covering used on Stick & Tissue aircraft replacing the traditional "tissue" body & Wing covering. a Monokote Iron is a hand held heating iron used to seal and shrink the monokote tightly around the aircraft parts.
There is also Trim Monokote in various colors that is also a thin Vinyl plastic with an adhesive back that I personally use in lots of Model Rocket applications. Particularly the extremely thin Chrome Trim Monokote used on Gliders over a center section of the wing below the motor to help reduce buring. It is also used on the a section of the inside of each rotor on most HD models where the burn-string holes hit the Rotor to reduce balsa burning.