I see no point in taking naltrexone as I'm not seeking any potentation. I've been addicted to opioids for enough time and I'm currently trying to get off methadone. So this is just an interesting phenomenon yet without enough proof for me. I've never been a guinea pig and I don't plan to

. Also, I don't recruit people for any testings.
Concerning potentation of opioid analgesic action, there are many ways to do it and not all are even used. A research on potentation of opioids with low dose of naltrexone for opioid addicts would be very strange as the world struggles with increasing number of addicts. Why would anyone research this for this purpose? Like I wrote, there are many ways to decrease the dose of an opioid by adding a drug that augments analgesic action and these aren't debatable like the case with naltrexone is. Maybe hence there's no rush to research this deeper? And naltrexone isn't really the most sought after treatment after drug detox to block the receptors. There's little demand for it in my country to be honest.
I've read about low-dose naltrexone. It has so many uses that it's too good to be true (also given the variety of diseases it "magically" cures: morbus Leśniowski-Crohn, colitis ulcerosa, sclerosis multiplex, polyarthritis reumatoidea, neoplasmas... come on). I'm not saying I wouldn't give it a shot if I suffered from some of these diseases but it would still be something like homeopathic drugs unless it really would do something.
EDIT: Actually, it could have been researched on a larger scale if not for all these advocates of low-dose naltrexone. It's been known for quite a long time opioid systems might modulate not only pain and it's known for sure opioids act on the immune system. But I guess some people just got it too far stating stimulating endogenous opioids production is equal to resolving so many diseases in which the immune system damage is involved. They just added B to A and this is totally unprofessional, this is not how biochemistry and/or neuropharmacology works. This is wrong, this is not plain math.