I have gone ahead and built the detachable wing already , dint want to take a chance with video as its not easy for me to build and shoot.also handling phone and doing it 
But I Will try and add pics as and when I can, I think that should help.if any questions do ask on this thread not on private message.this could help others as well.as well as members could give there inputs and I could learn too.
NOTE: the wings are built the same way as the elevator. Do see the plan closely ON POST#49

STEP 1: BUILD THE WING FRAME( DO 1 WING FIRST EITHER LEFT OR RIGHT)
DRAW THE PLAN AND FOLLOW THE SAME PROCESS AS RUDDER post # 21 22,23

FOR THE FRAME OF THE WING(PIC ATTACHED)I USED 1.5MM BALSA SHEET ,1.5MM X 1.5MM WAS USED

NOTE: PUTTING THE PLASTIC LAMINATE TO THE WING (wing covering)IS NOT SAME AS THE RUDDER.

.(if you can manage building and shooting a video with a phone  

NOTE:THE ARROWS MARKED ON THE PLAN that stick will be removed to reduce weight.as we will have a rib sit on it.so I removed it later.

STEP 2: GLUE THE RIBS .once glued follow post#24 with blade remove the wing..and the skeleton  will be ready

Next the parts to attach  the left and right wing in the centre (ear bud,balsa stick)Post #12 ,#13(pic attached below)was tied with thread and glued.on the wings TE and LE under the center rib of the wings.

will post more pics and details..soon

TO BE CONTINUED...........    

NeXt joining the stick and ear bud in post53 to the left and right wing

STICK
This sticks are then joined to the RIGHT WING (le and te)underneath

EAR BUDs
Are  joined to the left wing le and te (underneath)

Process: start with the ear buds 1st .tie the bud to the LEFT WING (te and le)with thread.do not stick with glue yet as u may have to adjust it later.
Next put the stick inside the ear bud.
Now u get the right wing and tie the stick to the the RIGHT  WINGs le and te(half the stick only to be tied)pic attached
Next make sure that the left and ring wing  is aligned nice and straight(the full wings le and te) A little space between the ribs is fine.
Then with a pin add glue to the thread only so much that ear bud and stick ..are
Glued to the stick
(Note the stick should not get glued to the ear bud)
Next remove the wings from the joints and then glue the stick and  BUD
(Note tieing the ear bud and stick on the wings side of the le and te rather than underneath is easier.)

The earbud for the post is attached later.

View from beneath(ear bud for posts later)

Once every thing firm and aligned you can gently remove the stick under the rib.see post#51 ,I've mentioned

Added more pics of stick and ear bud for easy understanding.

Next i add the 6mm x2pcs ear bud pieces(post#12) on the wing to join the wing post.(u might have seen it in the early posts)
This is a bit tricky so will post more details when I next have time..any questions leave a comment .. .but before doing so, read well from post#1 to post#58...your answer may already be in there.

NOTE : IF YOU MAKE A FULL WING THERE WOULD BE NO NEED OF STICK AND EAR BUDS  
My build is made to fit in a small box..and easy transport.

To all reading my posts,need some help.
im Looking for this 8520 coreless motor.any good genuine sources in india to buy from.
i don't need a pack with CCW just ..need CW.
(Please don't use it on this build )

Post #59 continued...the  6mm x2pcs ear buds are tied on the wings LE and  TE with thread to give it a nice tight fit (pics attached) at this moment the ear bud is not glued just tied to give it a good fit.same is done for the wing TE.

Then attach both left and right wings in the centre .

Next  the wing is place on the LE and TE wing posts(the 6mm Ear bud go into the LE  and TE posts on the fuse)pics attached

Now  the tricky part ...now u need to put glue to the 6mm earbud which attach to the wing post ,as well as have a good eye to make sure the post are straight at 90degrees as well at the wing is  perfectly horizontal .(i use frount view to do this)

also the  ear bud on the wings should not stick to the stick on the wings (where they join in the centre of the wing else won't able to detach) this will complete the wing attachment to the fuse

Hope this helps

It's not easy to explain so adding more pics

The F.F.2.E I'd ready ..  

Fits in a 15" box..
To fly all I need to do is attach the wings together, then attach the wings it to the post.

For Electronics i need to insert the control rod to the rx (servo) and  to the rudder  then  the rudder to the fuse.then connect battery(1s 70mah) and fly.
It's all up to weather and a place to fly now.so wish there was some indoor space to fly

A quick peep
https://youtube.com/shorts/AZBWgb9cE1M?si=tuKutaC4-Uhrq6DS