Grounding kit is needed, have u seen how sh!t the grounding is on our car? Ask if they gave u that extra cable, some do. Makes more of a difference on the 5AT than 6MT.
No technosquare is in USA, maybe they have someone in Australia doing them. I do think there is someone in Victoria doing uprev tuning but not sure, either way u only do it after u do all ur mods. I'm selling my pod filter, z-tube in month or so when I go FI. And yes u can install yourself. If u in goldcoast I'll install them for you. Plenum spacer bit harder but still doable