Vast debate that rubber parts. And then those handles. Bad. We developed a seal that "take the handle". And even to go to the end, we decided that the handles in remaking were good to help, but for the fans of the origin.
Here is the step. Among the handles mounted at the time, we will reproduce that with a "D" behind, as in the photo.
The joints are ready, and only associated with this handle. The handles arrive :-)

BUY YOUR KIT!

(PS: sorry for the face of the handle :-))

R4 4L handles rubbers

R4 4L handles rubbers

R4 4L handles rubbers