Ceeray: Looked through the link and I don't really recognize the two(?) Rafales being discussed. Aviation Jets is mentioned for one - it definitely has a lot of differences with the Wind RC. The other looks familiar and I saw one mention of JMB; that seems to be the old owner or old name of Wind RC. The manual I found online for the Viperjet (not provided by Wind) was labeled JMB but the photo on the cover showed a Viper with "Wind RC" on it. So I guess the JMB is related to my Wind RC Rafale somehow.

I don't have a problem with balance on mine with the turbine in the factory position; I've installed a Kingtech 260 with two Powerbox flight batteries in the nose, retract battery mid-cockpit, and the turbine battery at the very rear end of the cockpit equipment tray. Additional nose weight that the guys needed in the link was likely because of bigger/heavier turbines or twin turbines they installed. Didn't like the implications of cutting the main wing tube to move the engine forward. The fuselage at the wing roots is not reinforced enough to take the resulting concentrated g loads (at least the airframe I have). The non-JMB Rafale I noticed had an access hatch on top for the fuel tank in addition to the one on the bottom.