So I tightly folded some 600 sandpaper over a Spyderco sharpening stone and just "squared off" the nib. It takes very little time and pressure. You just have to make sure that you keep your angles constant so the grinds are flat. Then is smoothed on the sharpening stone (rough, then the smooth one). I rounded off the shoulders so they wouldn't dig into the paper. Finally smoothed everything on a couple of mylar sheets I had bought from Richard Binder.
Before sharpening, I loaded the converter with ink to act as lubricant for the grinding and smoothing, and would also allow me to test the nib during intermediate stages in the grinding.
Every now and then, I would test it for the proper thick/thin lines, and for hidden roughness. Would also peer at the nib with a magnifying glass. The process didn't take long at all. The nib was a bit of a dry writer and remains so now, but the broad line seems a bit narrower than my Binder .5mm's. First I wrote on a notepad I had handy:

[Note: the bowls/minims of all the handwriting here are around 2mm]
Hey, I thought. That's not too bad! Here's a close up of the writing on this cheapo, feathery paper:

I tested it out on HP Premium, which is very smooth, but broadens the thins a bit:

Very smooth. Again, not too bad. I was getting happy. Here's a close up on the HP paper:

You can see how the thins spread out. That's the only thing I don't like about HP Premium.
I was so happy with myself I made a journal entry (Kunst & Papier journal from wetpaintart.com -- review pending):

The paper isn't as smooth as HP (or notepad paper, for that matter) but the nib didn't snag on the surface. Here's a close up -- I didn't realize how rough the surface is until I made the scan. It doesn't feel that rough, that's for sure:

So there you are. I have a spare M nib, and another F nib that will soon be italicized. Maybe not as nice as Binder nibs, but cheaper. And it gave me some confidence in myself (I'm a complete klutz with this kind of stuff, believe me). If I can do it, most houseplants could manage. You might want to give it a try.
Doug