Wow, I wasn't expecting to hear a .90. I don't know if I could cram one of those into the Voodoo. I have seen them with the .70 surpass in them. Very fast. And it did fit.
Is your WM Dago Red the same size and weight as the EZ or maybe a little larger.
Also, I have only owned one four stroke. It was on a great big Extra 300. The motor wasn't quite enough for the plane. I tried to peak it out, but it kept dying on me. After about thirty or forty dead stick landings, I sold it. It had other problems too. I bought it used. Anyway, the experience left me doubting my ability to tune a four stroke. I just don't get the same feed-back. They seem to sound the same lean or rich.
Having said that. Hum! A four stroke. You have me thinking. :idea: