A couple thoughts:
With Trimix you mentioned you were not happy with the discomfort from the injections and the aftereffects pain from the Trimix. Many men use smaller gauge needles, ga.30 or ga.31, which reduce the injection discomfort. Also switching to a Bimix formula will eliminate the aftereffects ache.
Regarding you questions about
penile implants, there is a very active "implant forum" at franktalk.org.which can probably answer your questions.
www.franktalk.org/phpBB3/viewforum.php?f=6TG