You will definitely NOT get unlimited with a DA 50. I have a CA 31% with a 3W-75i - its a hair under 21 pounds and does have unlimited vertical. Flies great both IMAC and 3D. While the 75 is probably overpowered, the DA 50 would absolutely be underpowered. IMO you will never get the CA 31% under 18 pounds unless you use only one battery, two aileron servos instead of 4, and the dremel to remove some plywood with the DA 50 up front. I don't fly any big birds on one battery pack....

If you have a DA 50 - go with the Wild Hare extras... a much better fit. The CA 27% is too light for a DA50, you'll tear it apart.

DP