Ok Heres a question which will hopefully make things easy for me. Ive noticed that in your rules it is stated the line measure is too the centre of the model the big question is on a sidewinder jet what is the centre?? Over here in little NZ our rules state to measure too the centre of the engine.. So do I measure to the engine center or too the fuse/tank ??  Just need to answer this before I make lines etc.. 

Air fairs have been booked for next year So the nats are going to be a reality 

Robert Bolton