Sorry, Chris, that's all I have got. I realize it doesn't help you, I was trying to answer the other Chris' question.
I'm more of a TR3 guy anyway, i've only occasionally worked on TR6 in the past. Never used the tool or even seen one in person.
FWIW, here's the entry from a different manual, showing a different design of tool.
56 TR3 TS13571L daily driver
71 Stag LE1473L awaiting engine rebuild
7? Stag awaiting gearbox rebuild
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