Hi there, I has this procedure done at the same time as my bunion surgeries (both feet). I had it dine due to the metataesal bone was a little too long, and caused ball of the foot pain. I was putting more pressure/weight on the 2nd met. head, than the first. A millimeter or so was removed and a permanent pin was used to hold position. It's been 6 months on first foot, and 4 on the other. I had and still do, have worse presurre with the first foot (2nd foot is fine). I had to go back a month or so ago to have the pin removed (it was easy - no recovery time). Pain is less - but still there.
If you have any specific questions, I'll try and answer them.