The polcarbonate won't snap, but it can crack. Part of the reason for the redesign was to distribute the load along the chassis a bit better because there were stress cracks forming around the tapped holes in the vertical plates on the old chassis. This new chassis offers more flexibility where it counts, but is still quite rigid.
Think of how much your lexan bodies can take without permanent deformation.
SH Z-Car, Custom Crawler, 8s Savage, 12s XTM XLB 1/7 buggy, 4wd 4-link rear/IFS Pro4 truck, Custom Hyper 10 Short Course, Belt-Drive Mammoth ST 1/8 truggy, 4s 17.5 MM Pro HPI Blitz