I also use the RogG type, also 40+ years old! I should mention though that the first time I attempted to break the top joints on my (2012) car the tool on it's own wasn't up to the job. I ended up cutting a piece of 2x2 timber to fit between the upper wishbone and the garage floor (leaving the wheel an inch or two off the ground) and then whacking the loosened joint nut (via a piece of hardwood) with a club hammer. They eventually came undone with quite a bang! Upon reassembly I used a smear of copper grease on the cones and since then they have come apart very easily using the tool.
