i dont have any build tips other than cross the rudder pull, pull wires and hook one of the "z" connectors on top of the servo arm and the other on the bottom ! this will remove some of the slop. also dont wrap the glass cloth (if you use it ) all the way around the trailing edge . it causes clearance problems . I HAVE ONE OF THESE NEW IN BOX IN PERFECT CONDITION IF ANYONE IS INTERESETED , I THINK I PAID 275.00 FOR IT MAKE A OFFER .