The biggest thing is usability rather than location ( no point putting in implant in if you cant use it )
What jumped out to me with yours and I would reccomend is, your anatomical snuff box, I have an xSeries in each of mine.
Simply tuck your thumb under your palm and it is pretty easy to present to MOST readers without too much contortion required.
If you are not familiar with that location ( It is not mentioned much )
The anatomical snuffbox (also known as the radial fossa), is a triangular depression found on the lateral aspect of the dorsum of the hand . It is located at the level of the carpal bones, and best seen when the thumb is extended.