Yep - it's a lot to absorb all at once.
Re Stickers
Put a sticker at the very end of each slab - yep the very end.
Also use stickers directly above the concrete supports, I'd also use two stickers on each support as you have done in the middle support
Re Stickers
Put a sticker at the very end of each slab - yep the very end.
Also use stickers directly above the concrete supports, I'd also use two stickers on each support as you have done in the middle support