One more thing to add,To use a board as a toe plate isnt as simple as just placing a board across the tires. Here is why and what you can do about it. A purpose built toe plate is not straight up and down it angles out at the bottom to clear the tire bulge at the bottom. If you use a board you will have to set your board on cans,bricks,something to get it above the tire bulge. You could cut a u shape cut out at the bottom where the tire bulge is.If you can figure out a way to lean the boards in and hold them leaned I suppose that would work. I use to use 4 cans,and pieces of angle iron the cans held the angle up,but I had to have a partner hold one side angle iron and tapes. The bungee cords and clothes pins eliminate all 3 problems. They hold the angle and tapes in place,above the tire bulge.