My Hullavators are older models, but are quite serviceable and I have the adapters to fit them to the Wingbars. Consequently I didn't want to spend another $900 each on the latest and greatest models. Maybe the older ones fold down further than newer ones? I did loosely fit the 53" Wingbars to my car and I'm pretty sure the Hullavator cradles would have come too close to the car's doors. Anyway, I'm glad that your system works for you.
Personally, I think you'll be absolutely fine. I have carried two fiberglass CD Vision kayaks (and 2 thermoformed Pungo 120s before that) on my older Hullavators hundreds of times, including a return trip from South Carolina to Nova Scotia (3400 miles r/t) last September, with no problems. But, here are some quotes from my discussions with Thule in November of last year...
From Thule...
"I noticed in prior emails you also mentioned that you carried two Hullavators on your older vehicle. Based on the 40lb weight of the boats you stated, I can't recommend this outfit with your Santa Fe. This vehicle's crossbar maximum crossbar load is 165 pounds. With each Hullavator weighing about 50 pounds, this only leaves about 32.5 for each boat. Overloading the system could lead to unsafe conditions for fast stops and abrupt disconnection from the flush rails. I hope this clarifies Thule's fit system and assessment of the Santa Fe roof rack compatibility"
My response was...
"The 2023 Hyundai Santa Fe owner’s manual states that the maximum weight that can be loaded on to the roof side rails is 220lbs (and not 165lbs) “distributed as evenly as possible and secured firmly”. Each Hullavator arm assembly weighs just over 15lbs, the bar mounts maybe 3lbs each so the total for the two systems is approximately 75lbs and not 100 lbs. With 80lbs of kayaks loaded I should be well within the 220lbs spec of the roof rails. My previous 2012 Santa Fe also had the same 220lbs specification and I have carried these kayaks on it for over 10 years and from Canada to Florida at highway speeds – of course with cam straps and bow and stern lines - with no issues.
And theirs was...
"Thule independently tests all vehicles' weight capacities with a Thule rack system. This represents the "dynamic load" capacity of the vehicle - so the amount of weight that can be attached to the roof so that Thule engineers can be certain it will not disconnect in the event of a rapid stop, such as hard braking or front end impact. The rails themselves might have a higher capacity, and the racks can certainly hold more than 165 pounds when not moving (such as when using a Thule rooftop tent), but 165 pounds is the recommended maximum for this vehicle while in motion and the most I can recommend. This is not to say that overloading them will immediately cause failure, such as with your own experience, but Thule would no longer be able to guarantee the safety of the system. You are using an older model of Thule Hullavator, which for which I do not have exhaustive technical specifications available, but the current model weighs about 50 pounds, which is the basis of my recommendation. You are, of course, able to use the carriers and rack systems however you see fit, but using them against manufacturer recommendations will void warranty coverage on the rack system."
I continue to think that they are wrong in their estimation of two Hullavator systems weighing 100lbs, and that both your setup and my setup will be well inside their 165lbs recommended maximum but I didn't think my conversation with them was worth pursuing any further,