Thanks to friend of the blog Neil "Skinny Elbows" Roberts who has done my work for me this week!
He's posted the sketches, refs and finished artwork for his fantastic Sinister Dexter cover of Prog 1665 on his excellent blog. However, I couldn't resist posting the sketches and hilarious reference photos, you have to admire the fella for really living his work!
Please visit his blog here for the official version of how the cover was done. There's masses of other breathtaking artwork on there too!