Is that just a cap?
If you could find something large enough to replace the cap with (using the same threads), you could probably drill out the center and tap it to accept the RAM ball post.
Just a thought...
http://www.motorcyclelarry.com/index.php?main_page=product_info&cPath=46_59&products_id=260
sweet!!! been trying for what feels like a year to get one of these setups.
thanks for the time guys,
Joel
just got off the phone, looking like no chance in the near future.
You may want to consider this item also.
As you can see by the picture it has numerous mounting holes for your cradle.
Its very handy,for taking your device on and off the bike.
http://www.techmounts.com/products/index.php?page_function=detail&product_id=156
say if you could help the slow folks how does this work. i cant seem to find any info on it.
i did get a call saying my cradle will fit perfect on the round mount.
thanks,
Joel