First time using V15pro multi camera and it is impossible. I have a dell i7 at 3.6ghz 16gb ram windows 10 on ssd and gtx970 with 4gb but Vegas 15 can't handle 6 cameras in 4k locks up after 2 cuts. even trying to edit from the timeline with out playing it takes over 2 minutes for V15 to catch up after each cut. do not have this problem with v14. any ideas am I missing a setting or do I need more cores, more memory?