I have one of these Texans and have been flying it for the past 6 months with a 160 OS upfront. My plane has a balsa spar in it and I have done all kinds of manouvres including outside loops. However after reading this thread I am grounding my model till I come up with a way to beef up the center pannel, any suggestions will be welcomed. No more CMP stuff have advised two other CMP Texan flyers at our club to ground there planes. I think its quite indecent of Nitro Models to behave that way they are liable for all damages incurred by this gentleman.