Are these shocks meant to have air in them?

[Tbird232ci]

This feels like a stupid question. I've build countless shocks from Tamiya, Yeah Racing, 3racing and Yokomo and I can get them to be silky smooth with no air in them. I'm working with some RC10CE shocks, top loaded with plastic caps. I replaced all of the O-rings and used a liberal coating of green slime. But, I can not get these to either not have too much rebound, or not have what feels like absurd amounts of air in them.

What am I doing wrong? Have I missed something obvious? I really appreciate any help.

[JosephS]

What do your shock caps look like?

The ones above were a running change by associated. They make it much easier to bleed the shocks.

[Tbird232ci]

Mine do not have the bleeder screws. They are just solid black.

Are those caps available for the old shocks?

[Tbird232ci]

I just did a quick Google search and found those shock caps.

You sir, are my hero.

[juicedcoupe]

While I like the bleeder caps, you can do it without them.