There are a few other things that needs to be fixed... the screw holes for the "pipes" for example... I make them 2mm the first time, the screw didn't hold correctly... so I make them 1.5... they need a little help for the screws to get in.. but once the screw is inside, it holds incredibly well.
I was planning to work in some adapters... one for all those rings stock fanducts... and other for the new bulleye :P but I'm a little tired!!! I'll upload the source file... I'll clean it a little bit... then I'll make them public.. so anyone can create mods and do what ever they want with it.