I'm not sure what I'm doing compared to everyone else as chunking has generally not been a problem for me so far!
Running the ball diff in mine, which is about as smooth as I can get it, could try loosening a little more. To be honest, it could be weight distribution related too as I've never checked that. Running 12k all the dampers currently, Black front springs, silver side and a green rear spring (no sure on the origin of this, heard people refer to a schumacher green spring but can't find any reference to it, but it's significantly harder than the nickel spring). Car is generally really nice/quick to drive, apart from the occasional time when it shoots off to the left under power. I'm not sure how quick it is in comparison to others as there's some quick guys who run LMPGT with us which really blows your mind how much more rear traction they have until you clock why 😂
Surprisingly, class options are plentiful near me. Norfolk/East Anglia in general is usually a bit of a hobby blackspot but i've got clubs racing on 3 nights midweek and a couple of weekend clubs covering Mod and stock TC, silvercan TC, GT12, LMP, Minis, Fronties, Indoor 1/10 buggies, outdoor 1/10 buggies, 1/8 buggies and trucks all within a 30 minute drive. Push that up to an hour and you've got 2 1/10 buggy regional astro tracks and some outdoor tc and probably more clubs I've missed out! Think some outdoor TC would be fun at some point, but would need a car I care very little about to be able to put myself through the destruction of running on tarmac!