I ordinarily use no rudder offset. I do use adjustable leadouts. The leadouts, in my opinion, should be as close together as you can get them and still be comfortable. There is a formula as to where they should go. I start out the leadouts coming out a little behind the CG and them move them 1/8 in at a time (usually forward), until the airplane is flying such that I can look straight down the wing when it is flying, good tension everywhere, and no noticeable yaw on any corners. I have built 1/2A and OTS models where I thought it was too much bother to make adjustable leadouts. On these I made adjustable rudder and it worked pretty well. I understand the real pros use both adjustments, and of course, an adjustable wing tip weight box.

Making everything adjustable is a pain, but worth it in the end. Also you can learn a lot by moving things around and seeing what happens.

Jim