Here's the fix. This will work if you are using the short Front Runner mounting legs (220mm) for the other 4 legs.
Front Runner FRONT leg for the LR3/4 roof rack & a GenRite 1-3/4" tube clamp.
The base of the LR3/4 FRONT leg is steel, weld it to the GenRite 1-3/4" tube clamp.
Shorten the bottom of the LR3/4 leg by ~1/2", drill a hole in it & attach to the base.
Be sure to contact FR by phone, they willing exchanged the LR3/4 legs for the 220mm's at no additional charge.