My UCD3D seems to have a good bit of coupling requiring aileron and elevator to hold...

However, a friend maidened his this past weekend with a YS-91 and a 15x6...

He said it has no coupling at all... he just flipped it over and bled in rudder and it held true... Watching him do them supported what he said... I didn't see him "catch" it in anyway.

An interesting point is that he said he was flying only on the low rates and balanced per the manual.

I have heard of others too having similar experiences.

I wonder how this can be other than perhaps there are some differnces in setup... maybe aileron differential, throw combinations, etc...

It's neat to see a mod that helps it for some, but I'd like to know why some are experiencing it badly and others midly or not at all...