Mark,
Those MCS fittings are the main reason that I'm switching from the Rancho factory stuff. Brass is always better than plastic, and taped threads are less likely to leak than push-to-connect fittings. I'll be buying his shock fittings, and I have already prototyped a manifold out of machinable wax. I had to make my own as MCS' manifolds do not have the space required for the sending units (Dakota digital air bag senders) to be mounted as I want them. No big deal, I have access to a CNC mill and plenty of scrap metal.
Many 4x4ers have successfully eliminated Rancho's plastic tubing alltogether by using hardline and rubber hose -I'm going this route as well, for a cleaner look and a more durable system in the long run.

The leaking control unit is/has always been a problem for the 9000 series. It's well known that the increase in tubing and joints provides more opportunities for leaks. It's really just a matter of how much you care. I don't like them at all, and considering that my rate is pretty slow (it takes 18 hours to go from 9-0 on my worst (rear) pair, I'm doing better than a lot of others who have installed their control units.

GOVEHIX,
I did not intend to flame you or insult you in any way, I was merely trying to explain why no posters have taken you up on your request for a step-by-step explanation. Without knowing your level of technical ability (I have asked you before) it is impossible to say what is or isn't difficult to do.
I have been a tech moderator on quite a few forums over the years (BMW -1, Nissan -3, Subaru -3) and have never seen any member consistently take the time to type what can better be explained in a service manual.
I'm not one of those who wastes time by posting "read the manual" or "use the search function" but I have no problem with telling a member (who asks to be spoon-fed info) to "look it up yourself".
There are two viable reasons to post a step-by-step of any process:
1. It's unique. The poster thought of it themselves, and wanted to share the process with other enthusiasts. (Look through VehiCross Concepts' website for an example of this -'glass molding is not new, but he is making an entirely new product and sharing the steps involved the process).
2. It's a better way. Either more efficient, easier or better documented than what's already available.
Example:
I've discovered a way to change my transmission fluid in 7 minutes using no special tools except a magnet and a Barbie-doll head =post-worthy.
Doing it the way any service manual advises = not post-worthy.
*See Joe Black's website for a nice write-up on changing tranny fluid using a more efficient (thorough and easier) method -with pictures. Notice how it's easily found from this site, yet is hosted somewhere else. Also notice how members don't have to wait for it to load when merely checking a thread.

These are simply unwritten rules for any site. Many are here to help, but don't expect them to write a book in the process -there's plenty of books already out there. As the plaque on my old desk used to say:
"I can explain it to you, but I can't understand it for you"