I haven't run my a12 in some time and trying to step back into it. Running a pretty much stock build, setup sheet attached. My kit was only of the earlier ones where the c1205 plate inst the -1.5 version.
I was doing some testing with springs and a couple settings just to get a feel for what they do. Our track is quite small and speeds are down. Hoping my findings line up with others experiences and the conclusions I got out of this testing are correct. To me copying someone else's setup for 1/12 is useless due to the amount of variables at all times. I'm trying to come up with my own recipe of sorts for things to change and how I expect the car to react to those changes.

Test #1
- I ran the setup above for a couple runs just to get a good feeling for how the car drives and noted lap times.
- Car drives really nice and feels solid\predicable.

Test #2
- changed the droop screw depth from 2.1mm to 2.3mm. No other changes to car
- Car felt to pick up a touch of on power push. Less rotation, maybe a bit more stable
- Lap times were consistently slower.

Test #3
- changed the droop screw depth from 2.3mm down to 1.9mm. No other changes to car
- This seemed to reduce corner speed, maybe a bit more twitchy.
- Harder to drive
- Didn't feel it changed overall steering
- Lap times consistently slower than test #2
- I feel due to the car being harder to drive the my line. better driver might fare differently

Test #4
- reset droop screw back to the initial 2.1mm setting
- changed from short to long wheelbase
- Car is a bit smoother than test #1
- steering felt about the same
- lap times consistently same as test #1. Turned my fastest lap ever during this run

Test #5
- Kept the long wheelbase setting
- changed front springs to greens. needed 3 upper kingpin shims to maintain same droop
- car felt a little lazier, less direct
- felt some on power push compared to harder spring
- easier to drive
- lap times slower than tests #1 and #4

Test #6
- Kept the long wheelbase setting
- changed front springs to the short gold springs (mediums). needed 3 upper kingpin shims to maintain same droop
- car felt more direct, more sensitive to input
- no change in overall amount of steering
- the single high speed 180 felt like it may want to start traction rolling if grip gets any higher or really screw up corner entry
- no change in lap times from tests #1 and #4

Conclusions
- did not experience the game changer effect with springs that I expected.
- start with hard spring on larger track and work way down as grip increases
- softer spring likely needed on larger tracks with higher overall speeds to tame aggressiveness and traction rolling
- droop on this car is more of a "feeling". Increase droop to feel less aggressive, decrease to feel more aggressive
- the battery tray has some track butter on the outside edges so the car definitely has some chassis roll going on

Next time out I want to play more with the side spring position and rates to see what that does. As well as experimenting with DRH above RRH instead of equal to. I see most setup sheets either have no screws in am1205 or am1205 isn't even installed so probably skip that for now.