I changed the secondary from 53 mm to a 70mm version, i would have gone 75mm but i couldn't get that size
all in all for 49 +P&H it was the best investment for the 10" since the MPCC!
As for the baffling, i have done some research, finding that baffling is used to stop the reflections from light sources not inline with the mirror, or reflections that come from the front of the OTA onto the mirror which make it into the focal plane.
Using flocking does stop a lot of this because it captures the light before hand. Seeming though the flocking is a little bit exy for my budget, i am using cardboard painted in flat black paint (perfect) so ill let you know how that goes! though as for the felt squares in the focuser it would be perfect!
A good tool for you to have a look at troy is Newt 2.5. you can fiddle and play around with everything in there to let you see whats happening!