Good news from MotoCorse,
I contacted MotoCorse Italy last night for more information on how they secure this reservoir and make sure it is compatible to the latest RCS16 Clutch Corsa Corta which Brembo just launch and suppose to be available this April before this corona virus forced Brembo to close down.
They sent me a detailed info and I think this is a pretty secure and solid design. The bleed nipple thread is used to securely bolted the reservoir and you can still bleed the brakes on the master cylinder. (your wrench will be submerged in the pool of the brake fluid).
They use 2 double O-Ring on the connection between the black nipple of the Master Cylinder and the holes for it on the MotoCorse reservoir.
However, MotoCorse was not too sure whether it will clear the V4 fairing when the steering wheel is move from full lock to another full lock.
I guess, they never actually install one on a Panigale V4.
Now, its time for me to think this over and make decision...
The only thing I don't like is, the LEVER of the Corsa Corta is not as nicely design (in term of looks) as the Ducati by Rizoma brake lever that came with my bike package from Ducati factory (with the word Ducati on the brake lever it self and it also have the holes at the end of the lever for aero passthrough).
I also noticed that the design of the hinge (for the lever folding mechanism) on the Corsa Corta is different then the folding hinge of the Ducati by Rizoma brake lever so I cannot use the Ducati by Rizoma brake lever.
So I need to decide which is more important in my modification goal.
I still have about 1 months to think about this, since I just paid for a T-Drive rotor which is in back order until Brembo factory hopefully start delivery in about 1 months from now... not to mention the RCS16 Corsa Corta Clutch MC is in back order too.
In the end, I want to say Thank You to everyone who participate in this thread who shares their experience and knowledge.