Thanks for the feedback! Actually there is an intertesting point to be made about the part at 5:20. In the tab for this song it indicates that all these notes are triplets, and are equal in duration. On the record Petrucci actually divides the 18 notes in each bar into three fours and then one six. I tried to record it all in triplets, as indicated in the tab, to hear what it would sound like.
I used a Marshall TSL that I have had to 'help out' with a distortion pedal since it's total gain was decimated after it's last servicing, an RG, and as far as I know the cheapest double-locking seven-string guitar in the World...