Jussi

Cheers
I look in to it next week when i have the time and both the lid and the scala rider.

Installed today - autocom www-pages give the instructions how to take the helmet on pieces. Followed those.
Installed the speakers underneath the lining.

The only issue actually was the shirt of the helmet. It needed some cutting. The Scala Riders position can be found by checking the skirt. Where there is a narrow edge on skirt and the mic boom is long enough to be placed in front of mouth it is there and some plastic needs to be removed due the fastening clip on Scala. However if you remove the scala no visual evidence is left.
The skirt is tight to re assemble otherwise easy to do.