The plastic tubing for the hydraulic reservoir was too small in diameter.  So I just wrapped it around a few times with black electrical tape.

Next, I topped it off with some Spackling Compound and set to dry.  Tomorrow I'll sand the end to a flat conical shape.  This will be the bottom of the reservoir.  I'll leave the top unfinished, since its not going to be seen.

Painted both sides of the center rib

I made a HUGE Boo Boo....  Can anyone spot it?  Compare the picture on this post with my past post in which I said I managed to line up the "brackets" with the wheel well stringers.

Hint:  the pictures were NOT reversed....

Double hint:  Yes, I took care of it immediately.

My next post should reveal all....

Wow!  Coming from a fellow modeler and moderator, that's really a compliment.  Thank you sir.  It's greatly appreciated!    I'm sure during your tenure as member of the PMS & moderator of this site, you must've seen many quality models and know what to look for and what is involved.  Yet I managed to solicit such a reaction from you says a lot.
Again, thank you!

I'm really motivated now, but it's close to my beddie bye time... sheesh.   Ah well, tomorrow's Saturday.,,

A quick shot of paint, then on to the other side.

Once the brackets and accessories have been fabricated and glued, then I'll start working from the "inside out" and start with the large pipes and reservoir.

The maze of plumbing of smaller pipes and electric conduits will then be last.

The "brackets" were fabricated from plastic strips.  They were bent at right angles and given a few punches on the backside from my needle to give them some 'rivets."

The dial was made from fishing tackle eyes and the dial face was obtained from JTec instruments.  I probably go overboard and actually produce the exact dial of the pressure gauge, but this was one of those rare occasions where common sense kicked in and reminded me that all of this is inside a wheel well, which is underneath the air plane and hardly anyone would notice.

The plastic tube nearby is to be used as the reservoir.

Solution?  As the song goes from the Rolling Stones... "Paint it Black."

Much better....  Since I'll need something to hold the uplinks in place, I'll have to also replicate this feature over the two small squared holes..

Looking at the pictures of both the full sized Mustang and the models, I noticed there were large plumbings along the cutouts near the front of the "ceiling" near the leading edge of both wings.  I knew I was going to replicate this feature (my OCD said so), but I also knew I would need some kind of support for the plumbing to hold it in place.  The thin strips of plastic that's supposed to pass for stringers would not have the strength to hold the plumbing.  I figured if I installed some kind of background "ceiling" it would also double as a means for me to glue on the plumbing into place in between the stringers; thus providing two or three points of glue to help hold the plumbing in place.

This back "ceiling" would have to be somewhat spaced apart and supported by strips of balsa to give it some "depth."

The back "ceiling" would also have to be painted black.

Thus, commencing of the "ceiling" began with cutting out a squared piece of laminated paper to fit over the center section and leave the cutout at the front alone. 

I left the center rib temporarily in place for reference.  It also gives me a chance to see how I can go about camouflaging the torn pieces of stuck paper on the spar, which I'll deal with when the final detailing comes prior to plumbing the rest of the wheel well interiors.

The only mistake I made was not paying close enough attention to see that all four corners of the square cutouts were rounded.... Oy Vey.  Devil in the details....   This is where the uplock is located to hold the landing gears in retracted position.

I also determined the location of the internal stringers by simply leaving the faux ceiling in place and matching up the small plastic strips of the outer wing panels to made the line continuous.  The only place I deviated was at the square cutouts.  Despite using a tweezer, I just couldn't get my big hands  close enough in the ceiling with the center rib in the way.  I had to leave it in place so as to give me a reference as how close I could make the lengths of the remaining strips to almost  touching the center rib.  In the end, I removed the "ceiling" and finished gluing the internal strips.

From there, a quick shot of spray paint from my traditional rattle can.