I had my heart set on a Vaydor but my buddy bought one and it was held trying to build the car. I am trying to decide between the Vaydor, which is gonna cost a pretty penny, the Chupacabra and the Vex. If the price is right I think I am leaning towards the Chupacabra or Vex. I just want to make sure the build can get done quickly. I dont know if I can endure the hassle my friend went through with the Vaydor or the price tag although the design is ok. Any suggestions.