No,,I'm on first at least,,,,,,this jinma I own is my first tractor,,,so just going with my experiences there,,but would apply to most,,,,,,,jinma's have a factory screen,,very large openings in it,,basicly a rock shield,,its heavy duty though,,would stop sticks too,,,,,,so,,,,,,,after running it for first few times brushoging,,it never overheated,,but I noticed a lot of fuzz and stuff on/in raditiator and little on the screen,,,so I blowed it out,,,,than read on johns tractor page [or somewhere],,of this idea of putting window screen over the rock shield,to stop all small stuff,,,sounded like a good idea to me,,so,,,I did it,,,after brushoging in high grass for about an hour,,it started over heating,,that screen door screen was completly covered with fuzz and stuff,,no air could even get to raditiator,,,didn't take me long to take that crap off,,,thats the only time it has over heated,,now,,after I stop,,after mowing for 2-3 hrs,,I blow raditiator out good with one of those long air guns with a 150 psi air compressor,,,,problem solved,,,,,,,now,,,,jinmas are basic tractors,,don't know much about air flow and all that,,maybe a more modern tractor would have different air flow,,don't know,,my toyota pickup has a raditiator,,its got about 140,000 miles,,its never had its raditiator blowed out,and has never over heated,,course never used it to brushog chest high grass,,but still....... now,,sound guy what base are you on??? the thing