I'm glad they're working out for you Tim. These slip-stones are perfectly fine if you don't want to hone dozens upon dozens of blades. If you only do one in a blue moon they'll do just fine especially if you remember:
1) Sand paper is your best friend!
2) To finish off the edge you will need a finishing hone or another fine abrasive like 0.5 micron Chromium Oxide. I shaved straight off the 8k slip but it wasn't nearly as comfortable as it is now.

Speaking of sand-paper, it can also help you correct a frown quickly and easily. First check what the edge will look like when you remove the nick. If a bit of the frown is still left, just press down on the areas away from it to wear them down even with it and hone straight across.