What is the difference between the original black moisture control system and the new yellow MCS2?

I have seriously modified my MCS giving it rubber connectors to make it more flexible i.e. when putting pipes down and picking them up etc, I have re-enforced the 'L' joint as this was a weak point but most importantly have changed the valve to screw adjustable which gives consistency of air pressure thereby helping the unsteady blower.  All the new parts of the MCS2 are fully interchangeable with the original system.