Home of the Sovereign Protectors

Hi all. So I just got my rubies bucket, and so now am thinking about how I'm going to build up the inside so it doesn't flip around on my shoulders. Wondering what most people do here? I've thought about gluing in foam sections near the top, to cradle my head- but then I also realised that will increase heat. I just got the black series stormtrooper bucket (for kicks) and that is secured to the head by an adjustable strap that fits around your head like a headband. Wondering if that's an option- a setup like that? Of course finding that kind of head strap arrangement might be tough, not sure where to look.
Ok so suggestions anyone?

I just put some foam in the top.

I have a little bit of foam just above the vizor.