Disassembly and assembly of the Parker Sonnet cap using a self-tapping screw

[readytotalk]

I`d like to share how to disassemble the Parker Sonnet cap, and then assemble it using a self-tapping screw.
Found experience of disassembly, consists in drilling out a rivet, selecting a screw with a nut instead of it, fitting, gluing a black plug.
But, having seen a lot of "Sonnets", every time I thought - could it be possible to solve the problem somehow easier?
Here's the algorithm.
1. With a 5mm drill, drill a rivet from the inside, but very carefully, about 2mm deep.
2. Disassemble the cap, we have about 4mm of rivet left.
3. With a 1mm drill go through the rest of the riveting, and the black plug is pushed out (its pin diameter 1mm).
4. Then we need self-tapping screw with a length of about 3.5-4 mm and a diameter 2 mm/ to assemble the cap from the inside. Drill a hole for it in the rivet with a diameter of 1.5 mm, but not to the end, so that a fragment with a diameter of 1 mm remains for the pin of the black plug.
5. If everything is done accurately, the self-tapping screw will cut a thread in the drilled brass rivet and pull the cap together.
6. Finally, cut off the leg of the black plug a little and glue it in place.

 

 

[Cuppatea]

Hi! Good work there! Very skillful. 
I have a Sonnet Flighter with the top of the cap askew. In the photo hopefully you can see the clip is bowed in towards the barrel rather than out like my other Sonnets. Also the endcap is not centered on the barrel and there is a gap near the clip. I just gently and carefully hammered it and got it closer to normal. Then I realized the clip's bend was probably keeping it sprung.

 I don't have the tools or skill to do what you did. Perhaps the correct size extended socket wrench would take the cap and clip off the barrel. Then I could try to bend the clip into place and reset it. What do you think?
I'm guessing the nut inside is 5mm? Or 6mm?