So you think to level the car I'd need the perch on a clip 15mm below the stock position eh? Good info, and it makes sense given the 15mm drop. I'd read 10mm somewhere but I'm guessing you have researched this as thoroughly as everything else. I just don't know if I am comfortable going that deep into the already-limited bump stroke, so I think I will go to 5 or 10mm below and see how that works. I just want to borrow the lathe once so I'll do grooves at 5mm spacing.
I regularly carry about 20kg in the cargo hold and sometimes 50kg, so I would like to avoid the saggy butt syndrome.
I wasn't looking to lower the front more for an even fender gap, but I read that the STi has a slight rake and guessed there must be a reason for that other than looks. I cannot get the '09 WRX springs here as none were imported and none have come up for sale used in Japan yet either. The STi springs were all I could get, except for Tanabe or RS-R fashion springs.
Could I get your overall opinion of this set-up, the LGT Konis plus STi springs with a 10mm drop in back to match the drop in front? Is that too low for the available bump travel? I could pack the front springs about 5mm with some rubber gaskets top and bottom if needed.
Do you think the rear springs could be compressed on the vehicle and the circlip moved without unbolting the shock? That would really speed things up and save me an alignment. That perch looks pretty deep though so I guess you'd have to compress the spring to coil-bind before it would uncover the circlip. You probably tried that already...