That is an interesting technique. I noted Steamboat Ventures is at -88 and yet with the GoPro launch I expect they probably are going to have a good aggregate internal ROR. Would be interesting to try different slices against this, like rate of return vs growth. Back in the dot com days a lot of companies grew really fast, burning money, and then went 'poof!'. So from a growth metric they looked great, but from an ROI investment they were poor.