After Installing Firmware v1.51, Crane Still Unstable

I wrote yesterday that installing firmware update v1.50 to increase gimbal payload capacity to 1,800 grams made using the Crane unusable for camera/lens combinations weighing under 1,500 grams. Zhiyun Tech responded quickly, recommending I reinstall firmware v1.51. I installed the firmware this morning and shot a little video, and the shakiness is still there. Apparently, installing Crane Firmware Update v1.51 is not a solution.