Iv'e always tried to fix those racks parallel to each other Long U bolt & a flat piece clamp on the fork blade 2 nuts clamping that..
on the outside ends an acorn nut and 2 more nuts clamping the rack from the inside out
un-screwing them tightens the rack between them & the acorn nut.
that's, essentially . how the directions on the classic Blackburn low rider racks.. read..
in # 10 the acorn nut is too far out It would be poking into the back of your bags,, try again..
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Last edited by fietsbob; 07-19-20 at 04:17 PM.