I ordered 5/8" plugs off ebay. Although they fit, they do not fit snug. They tend to pop up when fan on high. I fixed that problem by installing two O rings on the bottom two ribs. I tried just using one o ringin different ribs, but nothing works as well as using two.
it has a smaller vent hole. so not sure how to mount the lights as they come with a bracket for the larger front grille openings. Im sure in time someone will make one
felt the same vibration, re read the directions, you must install both 8mm washers before installing pedal. Took 95% of vibration away, every now and then I feel it, thinking about using a 3rd washer.