OK, so I cut down the heat sink and zip-tied it on. Added some curvature to it too so bodies would fit better. It works well and I haven't had a cut outs yet but man that thing gets hot. An ESC will definately be my first upgrade.
Nice mod man......instead of ziptieing it you might want to hold the heatsink down using shoo goo........i dont recommend using CA to hold it down at all.