If you are considering an SXW or SXD mount, you REALLY need the Nex boards - eliminates the dec backlash issue, and reduces noises.
http://www.nexsxd.com/NexSXD/NexSXD_eng.htm
I am still contemplating an SXW, just need to know it will run OK, since Dec backlash is a serious problem with the Starbook.