Those screens are a waste of time I find, they dont seal and you get leaks all around the edge of the bowl. I'm thinking I might have my own bowl custom machined from stainless steel on a lathe, then attach a wind cover and screen to a hinge and get them sealing very well.
Even the available bowl+windcover+screen combos out there dont seal well enough, then the smoke thins out and you dont get as a hard a hit.
-Dan