Personally, I wouldn’t bother with any Pain Meds, Especially the Position 0 install.
Just be aware, the xG3 is 3mm and the other xSeries implants are closer to 2mm.
Just some more ideas for you to consider.
If you do decide to inject Lidocaine into your fingertip, also consider, the finger is quite small, so even a small amount of liquid injected into the fingertip is going to take up space, which may in turn make the install harder.
A topical PMK may be a better option for you or even just an oral OTC pain pill to “take the edge off”
Zoe ( @SurvivalMistakes ) has an ibuprofen install video on the YouTubes, Let me grab you a link to the thread and video…
Hmmm, The video is hiding from me ( For now ) UPDATE, Located and linked in post below
Another couple of videos for you