Is there a difference between a RakerII and a Raker II HO prop other then the vent hole adjustment? I have the vent hole adjusters out of the Raker II HO and it seems to come out of the hole slower then the Raker II that I had The only difference that I can see is the vent holes are smaller on the RakerII HO with the adjusters out then the vent holes on the Raker II