chuck is not cheap @ $350. Upgrade for g3/supernova2/titan/midi to use infinity jaws $150, retrofit for infinity setup to use current jaws $40.
Looks like the retrofit screws into current jaws and allows the quick change option. While the upgrade is new slide rails to accept the infinity jaws. From this there is nothing about using the existing jaws on an existing G3 or supernova2 via a quick change. For that to happen it sounds like we would need the retrokit for each set of jaws and the upgrade kit for the chuck.
So from that upgrade for my G3 and the jaw sets I have is 1", 2x 2", 4" and cole jaws; 4 in total. So $150 + 4x$40 = $310. Now on top of that I have a supernova2 which I would also need the upgrade kit for that, toss in another $150 to yield a whopping $460. Stands to logic for that $ I could easily buy 2x more chucks (add the 2x I already have) and just swap the chuck out with dedicated jaws and come in $260 cheaper.
Sorry this is not an 'upgrade'.