So I cleaned the MAF sensor - have only driven it twice since then and I'm not sure if I am imagining it or not but it seems to be more responsive when accelerating (noting that I am only driving within 5 km of home at this stage due to lockdown in Melbourne!!!

I also have a new intercooler on order from ARE (thanks for the heads up Pollenface) that will get sent down to me next week once they are back from holidays......looking forward to getting it fitted to see if it sorts things out!!