As I mentioned in that thread, for $4 at Home Depot or Lowes you can get a coroplast blank sign and make a windscreen before committing to cutting an expensive piece of plastic.
https://www.google.com/shopping/product/5314859134130239734?hl=en&lsft=gclid:Cj0KCQjwzozsBRCNARIsAEM9kBMuZ87Rn8YTsAAIbubiqQ_dJ_WHSo_OLi6SZBlihNOx7WNYnbO7Sz4aAlG1EALw_wcB,gclsrc:aw.ds&sxsrf=ACYBGNTLREGqm8bLnOFAb0YX-0njUdgeRw:1568901093677&lsf=seller:8740,store:16416027066574411730&q=coroplast&oq=coroplast&prds=epd:10443976632263504231,local:1,oid:10443976632263504231,prmr:2&sa=X&ved=0ahUKEwjcv-OThN3kAhWLMd8KHddEDgAQ8wIIdg