Fair enough question.
The LDX 75 mount will generally not be stable enough to hold your 10 inch scope steady. Sure, you can get tube rings for the 10 inch scope, balance the whole assembly on the LDX75 and it will slew and track if balanced well,
but, the all up mass will cause the mount to wobble un-acceptably.
You will need a more heavy duty mount. I have a C8 on an EQ5 (a similar mount) and it has too much wobble on the tripod. I'm soon to try a pier but I feel this may be an exercise in tail chasing.
Anyway my suggestion is that for a 10 inch scope you will need a HEQ6 mount...commonly called the "Atlas EQ-G" mount in USA:
http://www.telescope.com/control/pro...oduct_id=24338