The choice of using the 32tpi tap etc was more a matter of what taps & dies I had of the appropriate diameter for the job. Too small an O/D & the structural integrity would be compromised when drilling & tapping M6 & the rose joint would be weakened if too large a hole was bored to replace the existing M6 as supplied. I hadn’t used my ME taps & died for a while & thought I’d give them an outing.
The block was an off cut of square section, chucked in a four jaw, pilot drilled & bored out, then drilled to hold the two halves together once cut. The screw & pin exit hole were drilled, the exit larger than the scroll & the threaded hole tapped.
Finally the finished block was slit.
As an amateur workshop go I’m well equipped & I realise I’m extremely fortunate, my father was an astute buyer of equipment & I have stepped carefully in his foot steps.
M

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