There where inflight test made in germany with a 3D-piezo accelaration sensor and a datalogger in a 95" aerobatic plane with G62 or ZDZ80. Normal smooth maneuvers showed the expected Gs of 2 to 6 Gs but the aggressive positve and negative snappy maneuvers showed Gs up to 30!
The reason for those testflights where some broken wing tubes which already caused lawsuits.