Revenue Extension for Cost Based Revenue Accrual

Hi All,

We are using Cost based revenue accrual for our projects (percent spent).  We have invoked the delivered billing extension to calculate revenue based upon percent spent.  However, during our review of results we have determined we want to use a custom calculation for revenue based upon percent spent.  Is anyone aware of any issues in regard to using an extension to calculate cost based revenue?  Are you required to change the revenue method from cost to event?

Thanks In Advance,

Bruce Maghan