Hi woodscra,

>>Which size is suitable for a 22x8 or 24x8 menz prop, the 3.5

You want to use the 3.5. The 4" would be too big for the DP Extra. It will easily handle those size props. I have the Menz cut on the 3.5 Truturn on mine and I've used 22X8 and 22X10 Zinger Pro, 22X8 Menz S, and 22X10 Moki, and they all fit the cut out easily.

>>Has anyone tried putting the rudder servo at the tail of the 330?

I really doubt anyone has done this. The problem with this plane is tail heaviness, even with a gas motor up front. The standard location with pull-pull is the way to go.

>>I see that you just fold the wire over inside the hex piece, I don't see how this can keep the wire from coming through. Anyone care to enlighten me?

The size of the hole in the hex aluminum piece that the wire goes through is exactly the size of the wire. The folded over end, which is then clamped into position with the screw is never going to come out. There's physically no way. Just trust me, hundreds of people are using these on 40% planes without a problem. Nelson knows what he is doing with this stuff. I've used it on a 35% Radiocraft Staud, a 40% Carden Cap and the DP Extra without any problems.

>>On the performance side, my 330 with a Taurus 3.2 up front, do you think it will be able to peform an inverted flat spin with the engine weight up front?

Even with the Taurus 3.2 up front and servos all in the stock positions, you will need at least the ignition battery, and probably the receiver battery in the engine box to get it to balance in the 6" range. Move the receiver battery back and you'll be able to get to 7", probably farther than you'll want to go, but you can ask JBH about the far rearward CG range as he, and Michael Glavin are the only ones I know of that have tried this. FYI, I have mine at 6.25 and it will flat spin easily at that CG, upright or inverted.

>>has anyone had any issues of these becoming weak over several flights? Or do they seem to work well under high stress conditions?

I used them, but only for about 20 flights. I would quantify my flying as moderate to this point, without any problems. I have fair confidence they will be ok in the long run, but other people don't. If you are a radical 3D flier, I would change them out for Rocket City horns. Michael Glavin did this and has pictures and descriptions in his review of the plane. If you need the link, let me know.