3306 will do the job, but its a buggy servo not a 1/4 scale servo. good and strong and with high torque though....probably not the fastest either but not gonna 3d a DAK

Good points and its about reliable and having confidence - nothing to say a futaba or a JR wont fail just as any other for less but when you are putting all the multiple control systems in with a sensible redundancy sharing load to multiple servos etc etc then you are getting the realms of distribut...

Richard i hope you are progressing with the project, i think a confusion between Kg's and Lb's in the two earlier posts...mine is is closer to the 40lb mark. the rest of martins advise is solid though. IMHO any model of this sort of scale and weight needs the failsafe and reassurance of quality gear...