Mike,
Where did you get the support? I bought one from Speedquest, but it sounds a bit different from the one you describe. I think it cost a few bucks more, and it supports the end of the starter near where it bolts to the engine, rather than the far end. I recently saw a support–on a Japanese web page–that sounds more like what you describe, but was told that it’s not a official Rotax-approved part (for those who care about such things).