You are correct. The peg on GOD head is ever so slightly larger than the peg on HT BL heads, and you will have to grind off just a little on GOD head peg to get it to fit on HT body. However, I do not recommend this method unless you are well versed with your tools. I tried this method myself, and it was extremely difficult to get a smooth round surface. You will have to remove the peg to be able to get all the corners, and even then it was difficult to do, because the peg is so small. If the round peg is off symmetrically just a little bit, it will hinder the articulation quite a bit. I instead opted to modify the head peg on HT head. I won a HT head peg for $1.50 on ebay (Shipping was additional $3.00
), and I shaved off the top round peg until it was straight so I can plug it into the head peg hole of GOD head.
I am curious how Arrovve did his modification. Where are you Arrovve? Help us out!! We miss your pictures too!!!