If you have other tools than a Dremel at your disposal, then use them. I don't so I didn't. However, if you want my help, please do not insult me and the circumstances in which I do my stuff (family home, two very small kids, kitchen table and some inexpensive tools).
The logic of the modification is pretty straightforward, so if you wish to proceed, just take the lens apart and start figuring it out. That way its not me telling you to take metal off here or there, but you yourself knowing what you need to do to make it work. The main issue being that the outer half of the rearmost helicoid (as its not a 51.6mm lens it does have two) does not have enough room to move further inside the focusing mechanism to provide closer focus. When you take out of the close focus limiter pin this will become obvious. This half of the helicoid moves into a groove cut into the main metal block holding the focusing mechanism together. Machining that cut deeper might be possible, but I would be worried about cutting the block in two. This certainly would not be possible with a Dremel, shortening the helicoid half while retaining smooth focus throughout the focusing range yes.
As for photos, I'm afraid those'll have to wait. My newborn is coming home today from the hospital, and I'm pretty sure I'll have more pressing issues at hand than take apart an already perfectly working lens 🙂
