The updated code works correctly, making this patch even more useful for quick changes. I should point out that the graphics routine of the Turn block bridge isn't fully faithful to the original, as the last block in the bridge will no longer be flipped horizontally. Seeing as this is a rather odd detail in the original game which could be considered an oversight, I've let it pass.
Users of the patch should also note that it will reset the third Tweaker byte (i.e. the palette and the graphics page, among others) of several sprites (Pipe-dwelling Lakitu, the turn block bridges, bubbles, Ball 'n' Chains, Grinders) to their default values.