i'm not sure about that notice. when my horizontal stab came off in flight, i was using the recommended os 91fx, the 14x6 prop and flying and 1/2 throttle. and yet on the second flight, flying straight and level - BAM - no more tail. i sent the remaining piece of tail back to AnnMarie Cross and i have yet to hear back from her about what was wrong. but everyone at my field saw the wood used, we knew. the wood was so soft, you could crsuh it inbetween your thumb and for finger without squeezing.
thats why i know have a solid wood stab with spruce spars. i also added digital servos for extra holding power. i have now done full power low fly-bys with NO problems. and to top it off, i added some tail weight with the solid stab that i needed anyway.
tony