Hey y'all! Bought my first 521 a couple months ago, it has all drums, been working on it a ton. The brakes needed pumping to work, So first thing I did was bleed the brake lines and adjust the brakes(thanks to the tutorial on the forum). Since then, the brakes have been running really smoothly, been driving it 4x a week about 15 miles a day. This morning I went to drive it, and my foot hit the floor. My brakes don't work at all. I emergency braked my way back home. Any idea what this could be? It just seems odd that it was so sudden.