XRAY - Model racing cars

I've just purchased the XT2 2018 edition. I seem to have 3 different bags with arms in them. I'm building the carpet version. How do I tell which arms to use? I'm new to Xray. So far only have the transmission built, but I can tell I'm going to like building this kit!

Thanks in advance,
Bruce

So I figured it out. Labelled M & H. So far so good, kit build is going smoothly.

Yes, you can chose. We use medium on low traction and hard on high traction.

Martin,
Thanks for the reply. I've completed the build on my XT2. So far it seems like a solid kit; there is no slop at all. I don't recall any of my kits from other manufacturers feeling this good even when they were brand new. I can appreciate the hard work the engineers did on this kit.

Thank you, we are happy when customer is happy.