F2B......Don't get discouraged....its not as hard as you think......most important thing to keep in mind is assymetry....meaning that make sure the inboard flaps and outboard flaps are rigged to extend the same degrees(or distance) if there is a slight disparity between the I/B flap and O/B flap on the same side it will be ok as long as each "Paired "flap is the same.....the best way to get even flap deployment is to mount the servos identical and use identical geometry...IE same servo horns and same flap horns mounted in the same distance from the L/E of the flap....take an extra few minutes to make calculations before you do the installing and you will come out with minimal adjusting to do....the idea here is to avoid uneven flap deployment creating an unwanted roll when flaps are extended....finished my "Z" B-25 just last week and the flaps came out pretty darn close without too much work....B-25 has same similar I/B and O/B flap arrangement as the P-38......Good Luck....Bill.....