on the contrary...
compressing springs is very safe.
the springs are removed...and then tested for load rating, rebound rate, ppi etc.
the springs are then heated, and compressed to the required height..
they are then cooled in oil, painted, and retested to make sure they retain their original characteristics.
i'm never going to raise this car up again...the clearance was 160mm++ to begin with.. thus, the $320 to remove, compress and refit each spring is a bargain.
i didn't get a wheel alignment (but they are $35-$50).
So $370 compared to $550....I know which one i'd be choosing.
But yeh..i drive a 1991 mazda wagon...not the greatest performance vehicle