Walker Legs
The upcoming update will add another, much larger Walker Leg class propulsion module. The larger leg can support greater weight, and it provides even more stability due to its increased size. In addition to the new module, walker leg physics model has been improved, making walker unit handling and efficiency better.
Just two large legs are more than enough to support a tall unit firing two Artillery guns.
Advanced Module Configuration
The next update will introduce more module configuration options. Specifically, wheels and tracks will have the option of controling and disabling the automatic stability system that controls their power -- that will allow for better performance with more unusual designs. Wheel and track power output will also be adjustable directly. As always, advanced module configuration is optional, and usually is not required even for optimal unit behavior.
The update is scheduled for March 15th. More information will be provided in the update notes when it arrives!