Has anyone done this modification? I plan on running 2x8” rafters along both sides of the 2x4 against the roof and then using a collar tie on the upper portion of the rafter. I will notch the end resting on the wall and butt the upper ends together using a 1/2” plywood piece, glued and screwed on the upper ends. I am only modifying 3 of the trusses in order to raise the car on the lift. Does this sound reasonable?