No I didnt fabricate the parts by myself, except that two arms that is attached to the base of one of the carbs, I welded them to the bought part. I order it from a swedish company that sells linkage kits for webers , dellorto etc.
Yes, the setup make it a little bit difficult to reach the mixtures screws, but just use a smallsrewdriver

and remove the airfilter.
Everythings works very well, and its very easy to install.
If someone need more pictures , I can make more .
Regards FMO