It has been found through computer simulation that the mechs have a severe stuctural weakness in the elbow (ie. the tiny spot in between the joints) where, if hit by even small arms, the arm will detach, rendering it usless.
Also, an accurate shot into the laser cannon with either a rocket or repeated fire from a high-caliber rifle disables it permanentely.
The roosterpit is also severely underarmored, and can be taken out by a single rocket or multiple high-caliber rounds.
All computer testing was completed on both mechs, each having the same problems.
Several strengthening upgrades have been made to both mechs, and the mechs have been sent back to the Xarian Federation.