From your description, it sounds like the hole in the lowering block where the spring's centerbolt fits in, is too small, & the licenced motor vehicle repairer that you paid good money to, in order for them to perform a professional job, has just bolted it together anyway.

If this is true, then they have retrurned the car to you in an unsafe condition & are probably guilty of an offense under the act.

The top & bottom faces of the lowering block must be firmly sandwiched between the spring leaf & the mounting pad on the axle housing with no gaps whatsoever. It sounds like the 'qualified tradesman' isn't so qualified after all. I wonder if he has a licence? If not, then that would also be another offense.

some one must at least have a pic of their lowering blocks installed

gday,
i brought myself a set of lowering blocks off ebay for my 120y, has any1 done the same?
i got the guys @ mr. muffler to install them as i didn't have the time to do it myself.
i got it back and found that the block doesn't sit flat with the spring pack.
the raised section that is part of the spring pack doesn't fit inside the locating hole of the bottom of the block.
the block has a hole diameter of 13mm, and there is a gap of about 5mm between the block and spring pack.
shouldn't they fit together flush?
if any one has a pic of how it should all fit could they please post it up on here.
cheers