First of all that looks amazing!
I do however have a question. I'm fairly new to all this and as it turns out I have the same orange powerizers. I never really looked into modding etc when I first bought mine and now after seeing this I'm thinking I'd really like to do the same (maybe a different colour to purposely clash with the orange) but I am worried about how this will effect jumping. My spring covers (the slim plastic that came with them) has taken a bit of a beating. Did you gaffertape over the covers or directly onto the spring and have you noticed any change in the performance?
Also if I were to go about doing this is it as simple as just giving the spring covers a wrap or two of gaffertape?