Yesterday I tried the carbon inner shaft in my Lama for the first time. First I had to get it to fit inside the outer shaft so I extended the inner diameter of the outer shaft a little.
When I tried the shaft the lower insert came loose so there was absoutely no way to make it fly.
Today I will try to re-glue the insert in a way so there are better chances for the lower insert to stick. I have a feeling that the carbon might be good enough for this but experiments will show.
For the record I replaced the main motor in the walkera 4#3 Sunday.