Upload & Sell: Off
Well, I have version II (E55) with serial number 3624***. It's a 3 cam lens. I unscrewed the shroud by hand. It's very easy. There are two washer-like metal rings that come out, as well. Be careful not to lose them. Now that the shroud is gone, it doesn't hit my Canon 6D mirror. And the procedure is easily reversible, if and when you want to sell. Yay!!
Be careful ! The shroud acts like a retaining ring to hold the last element, it should be always on.