Hi All, The Genesis 46, or Mk III or "78 (it has been called all of that ) was the World Championship model. I am building mine with a very similar paint scheme as the original as a tribute to Bob's WC and his retirement from competitive CLPA. It will be powered by a Randy Smith ST G.51 instead of a ST .46 as the original. It is the biggest of the Genesis series and over 700 sq.in. The "'80" Genesis is much different with a smaller wing using a swept forward trailing edge (supposedly some ideas from Billy's Juno). Aaron will be building that one for Nos.30 and probably double duty.BIG BearRNMM/AMM