Sorry, been busy to answer earlier. Here is what I used for the 6 valk setup:
1 Yetistand alpha
1 knuckle
1 dual arm
3 elbows
4 xl arms
2 YA Standing
4 YA Banking
I also went to Lowes and picked this up. It's just a longer bolt to allow 3 arms thickness+ pads together (on the left).
Here are 2 more reference pics: