Definitely following. I have a script for hcg, and libido has been terribly unreliable/non-existent for the past year. I've recently decided to do a single shot of test once/week as I found it very hard to effectively use AI on twice weekly injections. I don't want to go above 125mg/wk, and would prefer to remain closer to 100mg. I know several guys who respond similarly the same as myself and they are doing well on once per week. That said, my shbg is in the mid-40s, and 4 days after a shot of 70mg I'm still above the top end limits to satisfy my endo. Recently tried 52e3.5 and I couldn't get it to work for me, which is odd b/c I was on that same dose for about 6 months. Failing this I have read of guys having success (for a period of time) using lower doses of test + HCG, but I read many accounts that the benefit is temporary.
As for coming off, I have a buddy whose brother came off, and he used HCG for a few months, and then it was about a year after stopping test that all was good. He says he now has the best libido and sex life he's had since starting trt. He was on for about 7 years. That said, he no longer lifts. Mostly cardio, b/c he just doesn't have that drive. All things being equal, I turned 50 a few months ago and libido and quality of life is my primary concern. The test does keep me stronger and gives me extra push, but it has been very challenging these past few years.
I would like to add one thing about your bloods, the HCG, and the adex. I suspect your libido boost was in large part due to the adex and the lowering of your estrogen to be more in line with your lower serum test levels, not the hcg. But, some guys def do well on low dose test + HCG. I will be following this thread. I'm very interested how you make out.
Good luck!