Technics SL-1301: To time tracking adjustment using oscilloscope

Hi All,
I’m adjusting per service manual after replacing caps (some were out of spec) and some diodes ( might as well while I’m in there) and I’m trying to adjust VR101 for T0 between 8 and 8.5msec. The horizontal line is roughly 1 msec on my oscilloscope, and the service manual points to somewhere in the middle of the horizontal portion of the waveform. If you look closely there’s a small bump there, which I don’t see on my oscilloscope. Do I estimate the middle of the horizontal line as the To endpoint? Any help is appreciated.
 

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