@crowriver like man the choice here is also like totally non-binary, well I have short legs and a long back so Can adopt a mean tuck position so long as the descent is not very windy with minimal blind exit/entrances for farmers or golfers. So descent to Whiteadder Reservoir from top o redstone rig or shorter but Hincty West Binny Hill near Uphall.
However on the lecky bike I am like totally upright Dutch person in a tweed suit big smile vigilant etc.