Mr.Force, I was watching the test video on your site and well I'm a little puzzled about certain parts. What I'm puzzled about is that the first part of the test with the 4lb bricks. It looks to me that 2 out of the 3 seem to go a little farther than the first one with both you 9 & 13hp blowers. Why is that? I'm sorry if this sounds like a dumb question but I can see that they are all the same thing and that you have done nothing to modify them in anyway yet 2 out of the 3 go I believe close to the 6' mark and I believe one even goes a few inches past. Again I'm sorry if this sounds like a dumb question.