Big Planer Boards & Jet Divers Questions

I was trolling last week a few miles East of Kelley's in 38-42 FOW and using big amish planer boards & size 40 jet divers to get my spoons down to 30 feet into the water column. I noticed that several times the jet diver would barrel roll and swim erratically and eventually surface because it flipped upside down (it happened with more than one of them so I don't think it was just a defective one). It seemed most prevalent when I was using the dreamweaver Trip-Z divers but still occasionally happened with the Big Fish Tuff Tru-Trips 40s. A google search said this can happen at speeds in excess of 2.5mph and if pulling heavy tackle but I was trying to keep speeds 2.2-2.5mph and was just pulling stinger spoons. Is it possible that there was strong current to blame? Winds were only 8-10mph and 1-2 foot of chop so it wasn't anything crazy. And if so, is there anyway to combat this and keep jet divers running properly?

For those who run big boards, what is your preferred diver to get spoons down to at least a depth of 30 feet? I do have size 3 tadpoles but I imagine that jets do a better job with bait presentation with their back and forth swimming.

Does anyone have any luck running size 40 jet divers at speeds > 2.5mph? If so, what is your secret to keeping them diving properly without surfacing? On the day I was fishing, I heard reports of people catching at 2.6-2.7mph so there will be times I will need to troll faster.

Is one jet diver better than the rest for it's ability to dive properly? Dreamweaver vs. Big Fish Tuff vs. Luhrs Jensen.

It was frustrating to say the least having to keep resetting my lines and I was getting a lot of tangles from the jet divers swimming so erratically...Thanks in advance for any insight :)