I am remiss in that I forgot to say thank you for sharing these earlier . The link you provided was not working for me earlier but now that I have tried it again , I can see that the skyhopper model was indeed the one Luke played with at the beginning of the film. I also love that Ralph Mcquarrie used your Y-Wing in his production paintings and now we know the source of the acronym for the Tie Fighter ( twin ion engine ).It is amazing to me that we can still learn new things about the original film over 40 years later. Thank you sir , you are an inspiration !