Originally Posted by velonomad

unfortunately both racks are a compromise, The delta gives you horizontal adjustment to level the rack and the jandd gives you verticle adjusment for different mounting dimensions. I helped someone with this problem on a Delta front loader rack last year by having them make a couple of aluminum tabs to reach down to the midfork braze on.
They went on tour with it and apparently had no problems
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l l
l........O...............O...........l
l___________________ l
......... l---23mm----l
3/4-1" wide x 1/8"thick x 2" long aluminum flat stock
Holes should be drilled 3/16 or 5mm diameter 23 mm apart