For those of you who tie, I am curious as to some of your preferences.

When tying in your hackle on wingless wets or spiders, do you strip one side of the hackle or do you fold the hackle? Why? What is the advantage or disadvantage if any?

What is the smallest size you feel you can tie when folding the hackle?

Any responses are very much appreciated. I am finding there are varying opinions concerning these techniques.