All good suggestions from everyone! I'm constantly adjusting my seat up and down and don't even snap that some people don't have a quick release on the seat! I have my seat post marked to the spot that I prefer to have it when I go downhill, makes it quick and easy to find the right spot.

Also, play around with your tire pressure. I prefer to run my tire pressure a little lower than most, but it really helps me with stability and in case anyone is wondering, no I do not get a lot of pinch flats.

And remember, everyone's body geometry/bike geometry is different, so your friend might not have to adjust her body as much as you because of her bike/body relationship. Also personally have noticed a difference between steel vs. aluminum bikes, and how I use my body with the different material. I love steel! Believe me, I've seen it.

I'm so glad you are really enjoying mountain biking and just keep practising!