Mark,
I was involved in the repair and maintenance of Foxes from when they entered service around 1976, till the last ones were withdrawn in early 1990's. From the very outset, they were troublesome, I recollect the high number of modification instructions in the early days. Regarding top heavy, I think more is made about fatal accidents than actually happened, the number of vehicles that came in for repairs after a rollover was very small, and we had a large number of dependants in our area. The maintenance of a CVR(T) is far easier than a Fox. The engine and gearbox is outside the turret area on a CVR(T), transmission gave less trouble than fluid flywheel and Wilson box and wheel stations. Also they did suffer cracks in certain areas, most worrying was the steering mounting. This could happen after a hefty thump to a front wheel station, like hitting a tree stump, etc.
This may not be the picture that private owners see of them, but when you had to keep them in active service, parts in short supply with long delays, you will understand. Other than that, they were a treat to drive........especially when the turret was removed :-D