Have been knocking off items from my TODO list.
First I decided to add straps and buckles to the gaskets to keep the biceps in place:
They work well to keep the biceps up and not hitting the forearms:
It did remind me, though, that when my biceps are in place, I can't put my arms fully down because they hit the sides of the chest. I think if I cut the inside of the biceps lower I could make it slightly better, but it's hard to say unless I actually do it, and then if I change my mind it would certainly be a pain to fix.
Since the biceps now pull a bit at the shoulders of the gaskets, I added a higher chest strap to keep things in place:
The next project was to add elastic to the bottoms of my knee gaskets, attached to (cut up) ankle sleeves in order to keep the knee gaskets from riding up. It actually works decently well, so I was happy my idea worked out. I don't think I'll be able to 100% keep the knee gaskets from bunching up but it's a lot better. As a reminder, this is necessary in my build because my calves are glued shut, and I need to slip my feet into the calf armor/boots.
You'll also noticed that I decided to rotate the knee gaskets by 90 degrees so the seam is on the inside of my knee. I found that having it on the back of my knees really made the bunching worse. This means I had to remove and reposition the knee armor velcro as well.