Hey Rob - Yes I was surprised these jacks had that much capacity.
Not sure how high I would have to go raise tires off the ground, I was thinking just take some or most of the pressure off the tires. Concerned if I lifted too high, rig would be unstable, especially in windy conditions.
If I jacked under the axles, I would need 3 jacks, whereas if I lifted under the frame. I would only need 2.
Does that make sense?
Thanks,
John