Adapter: Lamy M16 to Parker G2 (Lengthened)

[This adapter is 2.4mm longer than it would narmally need to be, because it is for use with my "Pen Tip Converter for Lamy Safari BP" part. The Uni Signo 307 pen tip, used with the converter, makes the overall pen longer by 2.4mm, so these longer adapters take up the difference]

I present my pen refill adapter, for use in pens that take the Lamy M16 ballpoint refill. It allows such pens to use the Parker G2 refills instead (not included), so long as the pen has been modified to accomodate the Parker's wider tip diameter.
This model contains 3 adapters, attached together with sprues, which will need to be separated using a craft knife.
The Lamy M16 refill is around 106mm long and 6.1mm in diameter. The Parker G2 refill is around 98mm long and 5.8mm in diameter.

The Parker G2 refills come in many varieties of ink, which are not available in the Lamy M16 refill size, so this adapter exists to hopefully provide flexibility, between your favourite pens and refills.

The adapter needs to be printed in the polished white or coloured plastics, as the smooth polished finish is functionally desirable.

Due to the very varied nature of pen design, I cannot guarantee that this adapter will work with any specific pen, although I've made every effort to make it as universal as possible.

I plan to make as many refill types compatible with as many host pens as possible, so If you have any suggestions on refill adapters, please let me know and I can hopefully make it available, depending on the relative sizes involved. I have now created dimensioned drawings of over 80 standard and obscure ballpoint, gel and rollerball refill types, so I like to think that I have a fair idea of what is and isn't possible.