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@BringMeMyFix
If I ride my SLR / SLR Flow angled perfectly level, there's a slight chance of fleeting numbness if I get lazy and stay rooted in one position for too long. This doesn't happen if I angle them up so that the front edge of the spirit level bubble just touches the line marked towards the front, IYSWIM i.e. about half a turn tighter on the front bolt / half a turn looser on the rear bolt (on a f/r 2-bolt seatpost setup).