Here are some telling images:
http://www.flickr.com/photos/7789950@N05/sets/72157604270189159/

--- In TeamCatrike@yahoogroups.com, "kkluckhohn" <kkluckhohn@...> wrote:
>
> I recently installed a TerraCycle Return Idler after one of my chain
> tubes 'wiggled' loose, and now the return chain is rubbing on the
> frame. I have come up with a temporary solution, but I was wondering
> if anyone else has come into this problem, and if they have what was
> their solution? I am trying to stay away from chain tubes, but if I
> have to I will install a small piece right at the frame to keep it
> from rubbing.
>
> I am considering adding an idler up towards the front, however I am
> unsure if it will make a large enough difference. Does anyone have
> any suggestions?
>
> --Kevin
>