Hi, got a thoughtful email from Polkat, I appreciate that. Davidmil, you lost me there. I thought I said the 1" 100 and 125 4 blade Tricks were termed Standard because they cut the same size hole as 3 blade heads such as Thunderheads. And that the 1 1/8" 4 blade Tricks were termed Magnum because they blow bigger holes. Didn't think I ever said Thunderheads were substandard. Thunderheads, in point of fact, are fine heads, and have been the best selling head on the market, along with Muzzy, also fine heads,for the last 20 years. No doubt they will continue to do a fine job for you.