I couldn't make sense out of the instruction to drill 7 holes- makes swiss cheese and looked like it would weaken things too much. I used a sheetrock knife and cut 2 openings to avoid cutting into the internal air horns on my sled. Then after I could see the air horns I opened them up so the stock intake could pull more air. It looked to me like the restriction in the intake will always be greater from the vent material than from the internal holes.
No mess and if you are careful the material drilling the small holes for the darts can be removed from the top using a vacuum as you drill.
My main objective was to increase flow in deep powder, doubt you could measure any performance gain although there should be a little gain.