Hi Aimster, This is something I've been doing but in a different way, on a drop in stock price I limit my buy to the 10% min and adjust the buy SAFE to conform with this. I do this rather than adjusting the PC, for once you change the PC you lose the history, and you run the risk of selling at a loss.
My method is similar to Fuzzy's who increases the Buy Safe by 5% after each buy.
Adam