ORIGINAL: gkaraolides
...They seem to have kept the wing dihedral the same, so all they have done is reduce the effect of the stab anhedral without affecting much else.
The effect of the stab anhedral is to provide a roll-in moment with top rudder in knife edge, to counter the roll-out moment from the wing anhedral, without transmitter mixers which didn't exist when the original was designed. So if the reproduction requires less roll-in from the stab in knife edge, all else being kept pretty much equal, this means the reproduction has a higher centre of gravity than the original. This might be because the original was designed and set up with a tuned pipe weighing about 200 grammes hung under the fuselage, while the reproduction is designed for electric power or i/c power without a tuned pipe.
It wouldn't surprise me if there were a few tweaks made.
I used to fly mine with a .75 turning an 11x9 or 11x10 prop and it flew great. Fit a 12x6 and it'd grunt around a knife edge loop, but apart from pulling huge verticals it was pretty much a dog to fly so I'd expect the type of props the electric crowd like to run might require some airframe tweaking. Have just fitted a Scorpion HK-4035-400 running 10S on an 11x10 prop and happy with the initial performance (only 1 flight) but very unhappy with the vibration from the motor. I sent it back to them and have just received it back so I'll put it back in tonight and see if the vibes are still there.
Mine's 20yo now, full of oil and I'd love to build another as they're a beautiful plane to fly.