Welcome! This site has quite a few folks from outside the English-speaking countries, I believe. Welcome. I love your car and your results are amazing. I wish that little car was sold in these United States.
Almost everything you need to know about radical cool mods on your car is covered in this thread:
http://ecomodder.com/forum/showthrea...-2l-18235.html
That was one of the coolest project I have ever seen on this site. I gather it cost him some cash, but it sure was fun to watch and I think you could learn a lot from it, if you are not already studying it.