Update,
After a false start finally got the 7" "quik-n-easy" mounts, the 4" ones would have been nice and low fitting the 80 better but the 24' ladder would have to sit way foreword to clear the lift gate air deflector and wiper when the lift gate is open. If I were to do a basket rack I would source the 4" "quik-n-easy" mounts even though they are harder to find.
The cross bars are made from .75" ID, 1.05 OD steel tube, a buddy welded some iron spheres in the ends to close them out and get rid of the sharp edges, had a local machine shop turn down the ends taking out the excess weld and about 4" at each end of the tube to fit the mounts (about 1.01")
I painted the cross bars and safety-wired the mount latches to keep kids & passerby’s from playing with the latches.
The mounts were about $100, I tried a much cheaper source but they flaked on me causing me down time and therefore money.
The a 20" stick of steel cut to transportable size and 8 spheres was ~$30
Machine work was $40
I am happy with this rack, quite sturdy and so far has survived 5K miles of Atlanta traffic, freeways, emergency braking, dirt roads and pot holes with no loosening or shifting, ratchet strapping the ladders to the rack holds them in place just fine without gunwale mounts but the ladders are taking a toll on the paint on top of the cross bars, I need to repaint them and cover them with some plastic spiral wrap before rust sets in.
I lost about 1.5 MPG, getting about 13.5 now, witch is annoying as I am putting 1K a week on it. Some of that is from increased idling time and city driving that I was not doing before on my mostly freeway commute.
Body roll from high mounted weight and push from cross winds are more noticeable now,
So how do you get rid of that howl? I have seen some ladders with expanding foam in the ends of the crossbars, they say that works, just worried about water getting trapped inside, I was thinking about speed tape (aluminum tape rated for about 600 MPH) any other options?
P.S. although it does the task quite well there is something wrong with using a Lexus as a work truck, I got a lot of funny looks and comments. Hopefully this will only be temporary.