You guys are on the right way already, but I thought I should share my experiences too!

Geard are more fragile, true! the gearbox are often a bit more fragile.

You often hear that a gearbox ruin the total eff% which i all wrong! you often have very good efficency on a gearbox, you often loose less then 5%. (othervise the gearbox would melt down) this is nothing I make up, it is the laws of nature, efficency comes with higher RPM, so looking at only the motor it has much higher eff% then an ourtunner, but you need the gearbox to swing a large prop for 3D. as for spoolup, again laws of nature... less mass and the mass is consentrated close to the motorshaft.

For 3D geard inrunners are the only way to go. it responds faster, have more power/weight and swings a larger prop. BUT when it comes to small foamies the diffrance get´s smaller, and the durability, low price and carefree use of outrunners has made them very popular. and you get very good power. it does not matter if you have 2:1 or 3:1 until competition day

Flying deeply gear Hackers I have still not been outrun by any DD or outrunner.

well, hope you get the idea

[link=http://www.electric-airshow.com/video/promotion1.wmv]My 12.3lb Electric Aggressor[/link]