It's still a question to me for timbers coming from the sawmill dried in a dryer. I guess in that case the spring effect isn't as important as the timber are kind of seasoned already and the offset should then be reduced! The precision is going to be difficult to realise for such a small of set. I feel it too risky to try for my case, but still don't read someone talking about that type of experience. Anyone?
One thing that can add to the issue is when using white pine for the braces and not oak or another hard wood. More risk to damage the tenon if the offset gives too much tension.
My next frame, I'll use green timber, hard wood for braces and I will drawbore...