I'm with you Russ, I also tend to wait till the blade breaks before changing it.
About breaking habits, reminds me of what one of my teacher once said, he said it was beter not to start habit for it's so hard to break. He said you can drop the h but there is stil abit then drop the a and you got bit left drop the b and it is still there. Most people give up at this point he reconed and so they never stop their habits. Thought I just share it for fun.
David