LL, a standard digital from JR as in the JRPDS537 is 40.3 oz. in. torque on a 4.8 power supply, .23 sec. @ 60 degrees of travel, weighs 1.58 oz. single ball bearing, 3 pole ferrite motor $34.99
On the UCD I run the DS811s advanced sport digital 54.0 oz. in. torque on a 4.8 power supply, .18 sec. @ 60 degrees of travel, weighs 1.44 oz. single ball bearing, cored motor $47.99 Don't ask about the rudder servo, I'll be shooting myself in the foot.
Centering and backlash is zero. Never thought I would want digis until I tried them. They are sick! Lets face it, 3D is not Sunday flying. You want and need response to your inputs when the sticks move, not a second later. They are not for everybodys flying styles and they are not for all planes, but I do think they provide the needed edge in 3D.
At the LHS he does about 15% better on these prices. Joe