I bought the kit and installed it on a new standard lift Honda blade. Drilling the stock blade was not possible with the cobalt or carbide bits I had so I heated the trailing edges of the blade to remove some of the hardness. The cutting edge was clamped in a bench vise to act as a heat sink and preserve the hardness of the edge. The airfoils are about 1 3/4" by 2 5/8" and made of what appears to be 1/8" mild steel (you could easily make your own). They are attached by 5/16" fine thread bolts about 3/4" long overall. The airfoils increase the lift on the blade by about 1/2".
In use, they increase the suction considerably but there's a problem. After about 5 min of use the engine shuts down like it's run out of gas. I'm guessing the stock Honda carb can't deliver enough fuel to support the extra load. After the bowl refills, you can restart the mower and mow another 5 mins. The modified blade does not cause any extra vibration (it seems to be balanced). I surrendered, put my old blade back on and finished mowing.

In use, they increase the suction considerably but there's a problem. After about 5 min of use the engine shuts down like it's run out of gas. I'm guessing the stock Honda carb can't deliver enough fuel to support the extra load. After the bowl refills, you can restart the mower and mow another 5 mins. The modified blade does not cause any extra vibration (it seems to be balanced). I surrendered, put my old blade back on and finished mowing.
