What method do you use to jack up your 5er or trailer?

OK, so my frame jacking worked although it took more blocking to raise to the needed height than I'm comfortable with.

I think I'm going to make cradleel top plate to fit on the new hydraulic (bottle) jack and just stick with jacking under the u-bolts. Don't need near the lift and I can still use my largjack-standsds under the frame for safety.