Rob, don't know what you're using for your conversions, but if you have a late version of Photoshop or Lightroom, the Nik (Google) Sliver Efex Pro plugin does a beautiful job. I have a bunch of sliver on my walls from back in the days, but I can at least equal them and perhaps beat them by using Silver Efex and printing on an Epson 3880 with its built-in Advanced B&W mode. Wish you could see the print from the pic I posted in the "Gone" thread.