Hi Nick
I just bought the same scope and a WO 2" diagonal to go with it. I also bought the SCT adapter which screws into the front of the diagonal allowing it to be fitted to the scope. Just take out the original 2" tube and fit the adapter. It is very short and works a treat. Steve at My astro shop has them. Link is
http://www.myastroshop.com.au/products/details.asp?id=MAS-191D
Good luck
Mark