RE: 25 size bipe
I forget how much nose weight I added, but I think it was about 1.5oz. But I got sneaky on how to mount it. I took a couple of engine mount beams, and screwed them to the firewall next to the engine. The engine is side mounted, with the pitts muffler, but that leave a lot of space opposite the cylinder. I then screwd the lead to the ends of the engine mounts, this moves the lead to right behind the dummy engine, way up front. It's still very solidly mounted though. If I had put the lead on the firewall, I would have needed nearly 3 times as much (based on how much lead I taped on there when first trying to balance the plane).
I also have it set a little on the tail heavy side compared to the spot listed in the manual, but it still flys slightly nose-heavy, which is fine for me for this plane.
I was really surpised at how soft the straight ahead stall is on this thing. But it does some really pretty spins, esp when the ailerons are crossed over. Mine doesn't quite flatten out, but it does change the angle and slow the descent to make it look really nice.
Btw, I've been told that the grey-black scheme is actually modeled after a particular full scale that was popular on the airshow circuit years ago. Anyone have pics of it? I'd love to add some registration numbers and such. It's a bit plane as it is.
It does turn in to a black blob at a distance on cloudy days, that's for sure.
The WM ultimate looks neat, but I'm not a big fan of the looks of the Ultimate. Now, if there was a .25 size Stearman....