You do not need the 44 shafts. I have run the V2 oil diff in the front of my XI with the stock 46mm. Only need the blades and obviously the diff.
My zero is also using 46 with the V1 oil diff in the front.
V1 diff outdrives can wear faster depending on the diff settings and motor class of the car. My outdrives and shafts are fine with 300000wt and 21.5.