The M2’s build platform consists of an 8×10 inch glass slab atop an aluminum spider, all supported by a trio of fairly stiff springs. Back when I was experimenting with excessive acceleration, I inserted some silicone rubber cylinders to boost the spring constant and stabilize the platform
The same vibration isolators that provided the vacuum cleaner’s floor brush rollers came through again:
I removed the screws and springs one by one, tucked a cylinder inside the spring, and reinstalled it:
The trick is to park the nozzle near the edge of the platform where it will rise without the screw holding it down, measure the distance twixt nozzle and platform, lower the platform by a (known!) 50 mm, install the cylinder, raise the platform, then tweak the screw to put the same distance between the nozzle and the platform as you started with.
This probably doesn’t make much difference with the default 3 m/s2 acceleration, but up around 10 m/s2 it seemed wobbly. No suprise: that’s over 1 G of lateral acceleration and the platform weighs a pound or so.