Well the Extra is almost 100% realistic and that is how they fly so don't think you are doing something wrong. The Giles is just much more forgiving.

There really is no secret other then you have to be ahead of the fall if that is what it is doing. DO NOT adjust a single thing on that plane if you want to keep it scale. That plane was dialed in my Roland himself as I know that one for a fact from the head designer of IPACS.

It's just practice. Just stay ahead of it.