RE:Adding a 10wt belly improved casting
Rio is coming out with a 35' midsection to replace the standard 15' piece on their Windcutter lines. This would lengthen the Windcutter "head" from 54' out to a more Accelerator like 74'. Apparently they will be in stores in the fall but you can pick one up from them for 25 bones.
I am tempted to pick one up for the 9140 but think that would be too much line for the 9-10-11 that I am fishing currently. However, the long midsection and the new 8-9-10 might be a sweet setup.
There is no substitute for time on the water.