Dale. Read the sports racing car regs at www.sportsracingcars.co.nz/ and tell me if there is any other class in NZ with less prescriptive regs. It is the only class I am aware of where someone can design and build a competitive car from scratch (as distinct from modifying an existing car). One could argue that it would be possible to design and build a Formula Ford or Formula Vee but neither of these classes allow as much scope for innovative design as sports cars.