Much harder, it's a very complex multi-part system from what I can gather. I bet it would just break when taking it apart.
GR07 is just a cellulose driver inside a nice brass grille, with some venting on the back.

I'll make a version in silicone and later in 3D printed ABS.

We'll see what kind of damping is necessary. I have Hifiman foam, fabric and mesh dampers and some microfibre cloth if necessary. I can also use Knowles dampers if highs prove to be problematic - or for venting.
Internally, I'm thinking to use either cotton or glass wool behind the driver. Cotton is less stable against moisture, but dampens highs better. (so good in fact one has to be careful with the amount)
No venting most likely, since this driver is bassy as it is. I can add vents if they prove to be necessary. GR07 itself has only a front pinhole vent.

The tubing will be wider than VSonic's standard nozzle, which actually limits highs extension of the driver based on a preliminary check of the previous IEM. I'll use 4/6mm silicone tube in the silicone variant, no extra tubing for ABS variant is necessary, as the interior will be printed too.

By the way, the 7k hotness in GR07 is caused by a shell resonance, so should be gone by default.
GR07 Bass Edition can also be used, it's the same driver with more venting on the shell. (extra 2 pinholes, one near strain relief, the other on front outside the tip)
Flagship has a different shell material (polypropylene?) and has 2 out of 3 vents: front one and the strain relief one.

On an unrelated note, I have 2x Knowles TWFK from Brainwavz B2 and 2x Sonion 26A005/8 armatures from Sleek Audio SA-6.
Unfortunately, I don't have any good extreme treble BA - will have to order. Sonion makes one that extends up to 20k pretty linearly. (Found it: Sonion 2354)
Yes, I do have parts to build a passive crossover, but I'll use a design similar to UE PRM - with the crossover as an add on box. Easier to tweak it that way.

So, given what armatures I have right now, I could build a combo where both armatures work almost in parallel, but TWFK is filtered with a 6k semi-wide cut, while Sonion has a smaller cut around 2.5k. Need a slight resonant boost at 1k, as both of these have a dip.

I will start a thread elsewhere to not completely derail this one.
Here it is: Hack-a-CIEM: Pirate's story

Consider my allowance of this dialogue to be a form of 'Constructive Engagement' which hopefully leads to 'Detente'.  Maybe someone learns something about the SE5 along the way. 

Posting a photo of AS' SE5 is not what AJ was asking. 
 
This "I heard someone say that this person PM'ed that..." is not acceptable in a continued argument.
 
I'm now tired of this and am asking you to stop it.  Until better evidence exists that there is a revision change, the only thing I can figure out is that some units may have issues and need to be sent back for rework. Oh, and Kunlun likes the SE5 and Astralstorm nailed it in his description. Fantastic.
 

Fine, let's move on.  Thank you.