We received about 15 inches of heavy snow last night and I finally got to really put the impeller mod to the test this morning. Worked like a charm, especially on the EOD snow. Now usually I`ll snowblow up to 6 inches of light snow in 5th gear, but today`s 15" kept me in 3rd gear because I could hear my 13 hp. motor was really working. Thank goodness for the 16" impeller. The plowed EOD snow was handled in 2nd gear with zero clogging. This mod is well worth doing.