Nice work! Thanks for all of your vids, enjoying them. I'm days away from getting mine which is the same spec as yours!
When you were taking the wheel off part of the initial jerk was caused by the wheels of the dolly being perpendicular to the direction they needed to go. I'd suggest that if you could (either before or after loading pressure) turn the wheels of the dolly by hand so they are pointed the right direct it might alleviate the jerk into that backing shield that you hit.
Though, after seeing how difficult and unnerving that was I'm definitely going to go with some 80mm studs
https://ind-distribution.com/product...onversion-80mm