If the D1 throtlle controller is one of the 6 then you won't need it after an upRev
Unfortunately not, the list is:
Exhaust
Air filter
Body kit
Window tints
Alloy wheels
Exterior decorative changes (roof, boot and wing mirrors are painted black, led brake lights and debadged)
I think elephant or bell might allow more so come renewal I can just go to them if one of the specialists can't sort me out with something better. They seem a bit anal with mods in general though so I'd prefer to go elsewhere next time if possible.