Well if you like to see what the upgrade would do, simply remove the v2 driver which is easy to do.
To remove a V3 driver we suggest using a dental explorer/hook to grab the rubber ring that is located around the gold contact spring. It is rather deep so best to get in from the outer rim..then pull it out. Once the ORing is out the driver slides out (however you have to remove the screws in the back to get it out). Then simply push it into the V2 with the oring - same way it was installed in the V3.
The result is a pretty amazing improvement in the V2s... you'll see. I suggest to get our upgrade once we start selling it.