Update and expansion of Readme.md

[BoxTrot]

Bill of Materials: Printed parts
- Added missing parts, update for OTC earbud tips

Bill of Materials: Others
- Changed ID of smaller silicone tubes to fit onto eartubes; the printed eartubes have an ED of 6mm and it was very difficult to fit 4mm ID tubes onto these.
- Silicone for ear plugs changed link as current does not actually set i.e. inappropriate

Assembly Instructions:
- Added more detail and changed order

[tareko]

Hi @BoxTrot!

This is excellent. Thank you for this.

I see your point about the 6mm silicone tube, however we found that over time 6mm ID tube will fall off. Yes, the 4mm is more difficult to place, but it definitely won't move and will remain part of the official setup.

If you don't mind reverting that change and poking me again and I'll accept the PR.

Thank you again for this. It really updates the README beautifully!!

tarek : )

[BoxTrot]

Hi @tareko, thank you for the kind comment. I've done as you asked.

I think the use of adhesives when attaching the tubes for the reliability you mention - and whether this (and the 6mm ID tube) will affect the sound quality - is something to consider in developing this.

[abitofalchemy]

I just noticed this thread where the issue of the 6mm OD x 4mm is inappropriate and we should be using 8mm OD x 6mm ID. I'll order this size tubing.