Mark,

hopefully answered in #18 above.

Here's an interesting photo posted several times before. Dave Brown with the T720 (or T750 - hard to say) in the background and a two blade prop and the Illusion in the foreground with a three blade prop. Note the different anhedrals in the stab of each. Also, the Illusion has the engine mounted at 110-120 degrees rather than the 90 degree side mount of the Tipo. This was to put the header down the middle of the fuse just like in Hanno's Calypso. Unfortunately, RE engines are trickier to install in the Illusion than one might expect due to the nose gear and front design. This is unlike models such as the Aurora which also have a belly pan tucked pipe where a RE is preferable.

One other thing that can be noticed from this photo is that the Illusion has less wing dihedral than than the Tipo, again consistent with flatter stabs that don't require the opposing dihedral in order to track properly in knife edge. I forget exactly how much dihedral the Illusion has by design but it is less than the Tipo. It might be a flat top wing in fact. It appears to be or close in this photo.

David.

P.S. Were you able to take some snaps of your Hammer kit and plans? Still interested if you are able to but don't worry of it is a lot of hassle.