We will use the "inverted" Hero system to hit roll. In standard Hero rules, you need to roll 11 or less to hit an opponent with the same CV. Under the system we will use, you need to roll 10 or more. The easy way to think of it is:
Just add your OCV and any modifiers to your dice roll, take 10 off your total and that's what DCV you hit.
If your OCV is 6 and you roll 11, you hit a DCV of 7 (6+11=17, which is DCV 7+10). If you rolled 5, you hit DCV 1. Once you get used to it, it's far faster and easier than the old system.