I've been flying with a Hero 3 Black for weeks using a Shapeways H3-3D specific clip to replace the stock bracket. Everything has been smooth with this setup. I recently picked up a Hero 3+ Black, but now the motors sound like they're overworking. With the 3 Black, the gimbal stays balanced when off. With the 3+ Black, the gimbal leans left (toward the motor). I've tried swapping batteries (the 3 has a 1050 mah lithium ion and the 3+ has a 1180 mah lithium polymer), thinking maybe the batteries are different weights. That didn't help. With either battery, the H3-3D freaks out with the 3+ Black. So then I swapped the Shapeways clip for the original stock bracket (the one that needs to be screwed in) and still, the H3-3D freaks out. There's no twitching and the gimbal seems to stabilize fine, but it's just plain loud. The motors don't sound happy. I thought the H3-3D is suppose to work with both the 3 and 3+, no? I know a bunch of people here are using both just fine. I've done an advanced IMU calibration. Didn't fix it. Ideas?