After a bit of research decided to replace the 12kg/14kg f/r springs with 7.5kg/12kg f/r to achieve a better front rear balance and smoother ride overall, 12kg is ridiculously stiff for the front. Got a pair of 12kg 220mm length bc coilover springs and installed them in the rear along with some new rubber dust boots, cut some spring insulators out of a piece of 3mm rubber sheet and the rear end is now much quieter and feels a lot better over bumps, still quite stiff but not harsh. Ordered front springs from speed factor in tauranga which should be here soon hopefully. Once those go in it'll be time to sort out the ride height and finally get the guards rolled, MTS in wairau have told me they'd call me back about 5 times about getting it booked in, mag and turbo's guard rolling technician is on holiday so might just take it to auto stance...
Also installed a small carbon fibre boot lip spoiler.