Impressive response - thanks much! Responses below. Photo attached.
control horn length from hinge point to ball length. 42mm

servo arm from output shaft to ball link. 40mm

Servo arm ball to control horn (lingage length) – 72mm

servo arm material? Aluminum, 2.5” (63mm) long, 4mm thick

servo brand and model number? Hitec 7955TG Titanium Gear

What battery voltage and capacity? 7.4v, 3600ma LiPo – dual packs feeding into Spektrum AR20120T receiver

What brand of switch? Soft switch

How many voltage input connectors into the receiver? 2