Congrats! We always set these up for max throws. A good rule of thumb is use the same length control horn on the servo as the distance from the hinge line to the control horn pushrod hole and you will have 45 degrees of throw assuming 100% travel and proper geometry of the linkages. And with most radios you can program in up to 140% on the high rate side for even more throw. I never go low rates on the fun flys anymore but if you want to fly more precision stuff and snaps you can drop the low rates down to about 50 percent on the tail. Expo is an individual taste but a lot of folks like to use as much as 40-50% expo on the high rates. I know some XFC pilots that use up to 80% on their giant scales!