Little boring update today, changed over the boost gauge sender (after getting the supplier to send me one, arguing saying my wiring is the issue when I know it wasn't, i checked it). Anyway, changed it over and it works perfectly.
FAIL SENDER ^^
In other slow news, had a loud squeel in my engine bay, ended up being the idler pulley that came with the charger kit - Losened it off a tiny bit and it stopped squeeking for now lol.
Liquid reservior for the charger cooling setup is leaking, will hopefully get to my Brother's in a day or so and fit an elbow for the filler and run a hose up so the expanding fluids don't run out the cap but instead they go up and down the line.
Lastly, tomorrow hopefully the washer turns up for the blow-off plumbing so this idle is fixed.
Once all that is fixed then I should literally have no more issues, besides tyres.