If i was you Carlt i would sell the yellow one, make some money on her and then put the black beast back to mint. A cat D isnt that bad, agreed it would put alot of people off but if its a car for you then you can run it like KP says and then you will have cheap motoring as i am sure you will get it mint cheaply with your facilities and skills
I really couldnt drive round in a yellow car and not feel slightly gay (yellow owners please dont take offence) you might aswell shout look at me out the window aswell when you drive past
and anyone i have spoken to about yellow coupes have said they dont like them (other then owners obviously)
Also think of how much £££ you could get for the plus.
thats what i would do, and spray the plus LE black, (like mine
) or something more exotic like you said