locating leaf spring sliders

Yeah the bracket just bolts to the original shackle mount. With the slider even with the bottom of the frame horn the car ended up about 3/8” lower than with the stock shackles.

The bracket itself is just a 3”x3" x.125" tube cut at an angle with an 3/16” plate welded to the bottom. If I had it to do over again I'd make the bottom plate 4.25" long and cut a little different angle on the tubing, the slider ended up a little further forward than I'd planned. It is also offset a 1/2" to match my 1/2" offset DoctorDiff front hangers.
View attachment 1715653669

Calvert also makes springs sliders with a built in angle. Best practice would be to have the slot in-line with the angle of the leaf spring. The AFCO sliders I used have a flat slot, so ideally I would have built a bracket with a little angle. Or used the Calvert's, although the angle they use is generic.
What is main benefit of slider over stock hanger with SS springs ?