For locations, check out
P1 - P5
I have had a few flex series implants on the back of my hand and I can highly recommend it due to the thin skin, They read very well.
Your own anatomy will let you know where will suit you best.
I have had a couple of these also, great service, great product great performance.
You wont be disapointed.
What did you get custom made? if you don’t mind sharing