Question: Has anyone here ever tried mounting a handlebar bag onto a handlebar extender?

Example of handlebar extender.

http://www.topeak.com/2007/products/...arxtndmain.php
http://www.performancebike.com/shop/...tegory_ID=4323

I am thinking of trying to mount the handlebar bag low on the handlebar stem of a BF or even directly onto the frame's head tube.

I have been asking around regarding weight limits and such, but still have not received any answers.