The hagburg mod is I believe removing .75mm of material from the outside of both RF aluminum mounts . this effectively reduces track width in rear giving me tuning options .
Another option with the 2012 is using the 2.2mm flex chassis xray offers . it defiantly gives more traction in low traction conditions with its softer setup .
This might sound really weird but in med-high traction conditions I've swapped front and rear shocks& springs (tho it was accident at first) it kept car from being on edge wile still allowing it turn in hard .