Anyone try these? http://www.bhphotovideo.com/c/product/135649-REG/Spot_Pen_SOSP10W_SpotPen_Retouching_Pen_Set.html My spotone is getting old...one of the bottles is largely dried up, and as I'm looking to replace the spotone, I came across the above item, and wondered if anyone had tried them. They look like a good idea, but I have a feeling they won't last the same twenty years my spotone has lasted!! Still, spotone is gone, and there are some other dyes out there, but I'm tempted to give these pens a go. Thoughts???