Working on them today! The latest bleeding edge builds have pretty close to final versions of the pneumatic flipper systems. They are close enough that we are finally comfortable rebuilding the premade flipper robots with the new flipper systems..
Speaking of what is the website the bleeding edge builds are on?
Please check out the Discord if you are interested in participating in the bleeding edge builds. Bleeding edge builds get a LOT of discussion, so we are using Discord for that.