Colin, sorry, but as a CAD draughtsman (and ex drawing office manager) I wouldnt call that a drawing, (other than in a vary basic way), proper CAD can do so much more. see attached. which were drawn up in 3d in CAD. as an additional comment more on topic, I upgraded my win 7 machine to win 10, it has 2 CAD packages, autocad and microstation (though autocad is the studdent version) and after the update to win 10, both packages continued to function perfectly (though initially microstation had trouble getting the licence- I think I had to re-input the wifi password).
Grendel
ps - the royal tudor pdf is a 3d pdf and is rotatable if you have the right version of pdf reader.