the pink/purple glass was originally clear. It contains manganese for some reason or another that helps improve one of the glass’s properties. Over time when manganese containing glass is exposed to UV light, takes many decades, the UV light causes the manganese to change its electron state (i dont remember if its reducing it or not) and causes it to change into that pink/purple color. Laura come check out the headsight booth at farm progress! That 612C would be a great platform for some height control and row guidance. Love the videos keep up the hard work and best of luck with the harvest prep! Dry Land Corners- I really like when they use technical terms. It really draws me closer to the subject. Could you do a show on how you count the rows on an ear of corn and then estimate bushels per acre. It’s interesting but complicated.