Uprated CVS and shafts

Sorry for the late reply guys

Right my "opinion"

Why would you go to all the expense of replacing your tiny cv's with larger stronger alternative and not fit the rear carrier for a few quid more for all the benefits it would give

The shafts would be bigger diameter (and a couple of mm here give a big percentage increase in torsional strength)
More splines=more points of contact=less chance of stripping splines.
4pin diff shares the balance load with 2 more gears so that effectively doubles its strength though the diff gears.

All this extra strength is useless without correct assembly and maintenance.

Cheers