I tested on 1.72.1 and the max validation is almost same because this is slowmode tweak.
the different between 1.72.1 and 1.73 is the difficulity , u need to spent more time to wait for "F7" key.
when I got 6.998GHz , I spent 3 more days to chase 7GHz .
However , the 2MHz is far away for me. T.T