Stacking aluminum lowering block?

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I used 1" steel lowering blocks on my car, but boxed in the perches and welded the blocks 100% all the way around to the perches. I also have -1" split mono leafs with Caltracs on it as well. I am running 30" tall tires and it now sits about stock ride height.
I lowered my car over 6 inches in the rear. 2 inches with sliders. 3 inches with rails and 1 inch with lowering mono leafs. The front 4 inches I used 2 inch lower coil overs and 2 inch drop spindles. Then leveled the car with tires. I refuse to use lowering blocks. It changes the geometry of the spring and their function.

You can easily lower the car 1 inch in the back using sliders on the rear of the springs and lowering hangers on the front.