I think I'm about going ahead and getting the Venus. I have been doing research on the Venus and have heard many people saying it is tail heavy with .46 sized engines. So, the extra weight of a .91 4s might make it balance just right. And if it does come out a bit nose heavy, I'm sure I can move something around to make it balance. Great planes suggests a .71 4s as the high end engine. I don't think moving to a .91 is going to make such a huge difference that it will shatter the plane because of its immense power. I am not a newbie, and I know throttle control. I won't put a 10 pitch prop and try to break the sound barrier or anything. I will have plenty up upline power however. I do have a Thunder Tiger .46 pro sitting around too if the four stroke doesn't work out. I was just really looking for a good home for the .91. Previously, I had that engine in a [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXS641&P=7]Kyosho .40 sized cap[/link] that suggested a .52 as the biggest 4s and I had no problems with it. I'll let you know how it turns out.

I have a tower gift certificate that is burning a hole in my pocket