Aaarg! Help me save my data!

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So I managed to do 2 stupid things while riding today. First, I forgot to zero the ptap, then I managed to delete an interval file from a CP test. So, if the torque was off by "1" when I checked (immediately after the test), the default torque on my powertap when zeroed is 517 and the averaged wattage was 350, is their a way to find out what my actual average power was? Is it as simple as subtracting the number of watts the powertap was off by while coasting?

So I managed to do 2 stupid things while riding today. First, I forgot to zero the ptap, then I managed to delete an interval file from a CP test. So, if the torque was off by "1" when I checked (immediately after the test), the default torque on my powertap when zeroed is 517 and the averaged wattage was 350, is their a way to find out what my actual average power was? Is it as simple as subtracting the number of watts the powertap was off by while coasting?No, but this thread helped me fix a ride with erroneous torque values:

http://www.cyclingforums.com/t-393571-15-1.html