Hi,
currently, on Ebay, somebody is selling a full package (airbox+TB) from 748R.
Prices are interesting...for the moment. Take a look (it's not me or a friend

)
What kind of frame do you use?
I'm conducting a similar project from a 916 Bipo, but it'll take time due to my job. So tell us about, it will be very interesting to have your experience.
Bye