The TSTRVvar is 20.75 to 31.75 adjustable.
That's the distance from the front edge to the T thread shoulder.
If used with a male/male on the Spectra-L200 that would add about 2.5mm, then the 360 rotator is 5.5mm wide.
So when stacked: m/m>TSTR>360rot ; min: 28.75 and Max 39.75mm
HTH
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