You want to install 14 Bigserts ? Okay...Remove the remaining, regular timeserts and then drill, tap, insert the 14 bigserts.
I don't know why or what your torque test is. I thought that was supposed to determine which of the remaining timeserts can handle the torque..If you are replacing all 14, who cares?
I don't like using the timesert or bigsert drill to remove old timeserts. That is a special tapered, notched drill bit  more than $125 if you want to replace it, So I would save it for drilling the aluminum block for the bigserts. Do not use it to drill out steel inserts.
This is what I would do to remove the timeserts
1. screw extractor
2. reverse threaded drill bil
3. regular drill bit*  but not the bigsert drill bit
* The major diameter of a regular M10 x 1.5 timesert is 0.474. So, I suggest you get a 15/32 drill bit (0.469), and then finish the hole with the Bigsert drill bit which is 31/64 or = 4.84
