I know everyone seems to complain about how loud the cooling fans are. I'm not so much concerned about the noise since I have a cooler that's louder than the welder anyway, but the fans seem to oscillate so much that the the whole welder is vibrating. I can feel it through the power cord and gas line and by just placing my had on top of the case. This can't be good for the future of the welder. Things will start to deterate. I was trying to find a replacement fan, but I can't find any info on the specs of the original. The largest flow I could find is 72cfm each that are the same physical size. I put them in the machine and they are much much quiter. This wasn't my intention though. The machine doesn't vibrate at all now. The replacement fans are ball bearing and much better quality. I can definitely feel the air flow from the rear and exiting out the front and sides. I'm just concerned if it's not enough. I don't run the welder anywhere near the limits so I'm not too worried about it right now. Does anyone know the cfm on the original fans? The fans are Bi-Sonic model YM2409PST1, DC 24v. Internet searches came up empty.