When I got my Lovells GVM upgrade I was obliged to have Lovells shocks fitted. No complaints, but haven’t tested them on long distance corrugations yet. At the time I asked if I could substitute them with Konis, but understandably the answer was no. When the Lovells need replacing it’ll definitely be Konis though. Have had them on motorcycles, on both ends of our bus & on the Tvan. They might not look as ‘macho’ as some, but they do the job, do it well & keep on doing it, & when they do eventually get past it they can be rebuilt.
I’m not sure if the double wall construction is common among 4wd shocks, but this is how the Konis are built. One of the shocks on our Tvan has a pretty big ding in it, presumably from a flying rock at speed, which I reckon would have put paid to any single wall shock, but seems to have made no difference at all to the performance of the Koni.