Pen Tip Converter for Lamy Safari BP

I present my Pen Tip/Head Converter, for use on the Lamy Safari M16 ballpoint pen.
The Lamy Safari is a popular and high quality budget pen, but it's M16 ballpoint refill is considered by some to be it's least impressive feature. The refill's unique shape and the pen's corresponding internal cavity make fitting any other type of refill impossible, without seriously modifying the pen's screw off tip/head section.

This pen tip converter has been designed to allow the black plastic tip from a Uni Signo 307 pen to be installed onto the front of the Lamy Safari BP. The Signo tip has a larger internal profile that allows many popular refills to work in this pen. In addition to this pen tip converter, a refill spacer or adapter will be required, due to the difference in overall length between the M16 refill and the one used to replace it. Spacers can either be made from basic materials such as plastic or wood, or purchased from me, designed specifically for the desired refill.
A different front spring will also most likely be required, as the one supplied with the pen may be too narrow and snag on the neck or shoulder of the chosen refill.

The Signo 307 tip will add around 2.4mm to the overall length of the pen and it's refill cavity, so any refill will require this extra length to be added to any refill adapter used.

I would suggest printing this item in the Black High Definition Acrylate material, as it is the closest material to the pen's original in terms of appearance and surface finish, although it should be considered less durable. This is the only material that this part can be made available in, as the threads would be too detailed for the other printed plastics.

Due to the varying nature of 3D printing, I cannot guarantee that this part will definitely work with the Lamy Safari, although I've made every effort for it to do so.

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 or ansilliary parts like this one, 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.