After @ three seasons, the bottom front edge of the rubber blade becomes dull, and it doesn't clean very well. But, you still have three more edges (9 more years). Plus, after those nine years, use a tire grooving tool to make long and diagonal grooves. According to the way I see it, it looks like I don't have to buy another blade.
Yes, James; as you can see after 0:56 of the video, most parts are accessible from any hardware. The only part with some modification is a made hook to catch the rear lip of the bucket.
