Originally Posted by F1 Rocket

Depending on the age of the kit the servo pockets in the stab might be a bit tight for most of the “standard” full size servos available today. The 8411’s are a bit thinner. Later kits have a little more room. I’d consider the MKS HV747 (mid size) or MKS HV1200 (full size) if you have room. The 747’s will require a bit of adaption to the mounts but this is easy to do. If you need lower voltage servos look at the MKS DS1220.