Thanks mate yeah i think i got the right compression this time at 1.5 mb/s , ive always had trouble rendering off at a good compression so ive ended up editing and exporting out of Vegas ,then importing into the default MS movie maker and exporting out again with the 1.5mb/s setting that brings a 1.6 gig video down to 80mb with the right look to it ..
and yes with the trackIR4 ,no extras like clouds ,no movie effects ,100% default apart from my Abel Tasman addon