Yeah it's very hard to replicate as everyone's driving routines are different. There is no 'play' to detect on the ramp by levering on things.
The root cause is the bolt holes in the subframe being lot bigger than the bolt shank diameter, which is deliberate for ease of assembly at the factory. When you sling those big old 225 tyres onto full lock at parking speeds (especially with a 180Kg V6 pushing down on them), things are going to move!
Hard cornering can shuffle things around a bit as well. I remember before the dead set, it was so bad, my steering wheel wouldn't quite go back to centre after a hard thrash!
If it's any consolation, some Hondas have exactly the same problem
Anyway, you don't have to use the Tyrol Sport kit. There are plenty of copy kits out there. The unique thing about the TS kit is they include uprated ARP bolts for the problem areas, which can be reused and are a much higher tensile strength than the oem bolts.
Having the subframe trued up and all slack removed from the bolt holes presents other problems in the future though, just to warn you! Reassembly can be tricky if dropping the subframe again, but on the flip side, the alignment doesn't change