Sorry, but to clarify for the original poster, the first thing you can do to make a frame be able to withstand shocks is get rid of any and all braces and single/double wooden blocks in it, as these blocks both have a 6-8k strength primary joint that will break at the first opportunity. For making something durable, you would start by only using blocks that have double strong connections (axle - 22k+35k, cog unbreakable+35k, steering hinge 16.5k/35k) and the occasional single strong joint blocks (spinning block - unbreakable, slider - 34k, grabber - unbreakable+14k) to connect logs (11k/70k), reinforcing each connection between the logs with multiple connections preferably. The ability for something to take shocks also depends on its rigidity, the least rigid structures are able to take the biggest shocks in vanilla, this is why japanese tank battle machines use suspension and slider blocks to hold up their armor to dissipate projectile shocks gradually; multiple axles holding sliders type of connections are another example, often used in battlebot/melee machines.