the chassis braces are a good addition but to make it really bulletproof all you need to add to them is the CNC steering knuckles as the cast ones can & do strip sometimes & maybe a set of the Trinity K-factory bolt in hingepins!
with these parts fitted the K2 will be supremely strong & reliable
you might want to change out the 2 TCD's for std diffs though as most prefer the feel of regular diffs & the C5 is a real powerhouse of an engine there is a recently released revised version the C5BB which is easier to drive & a lot better on fuel than the last version with a wider more useable spread of power, im saw one in action last week & it was very impressive